Formulations of deferasirox and methods of making the same

ABSTRACT

The disclosure provides for improved pharmaceutical compositions containing deferasirox (DFX) and methods of manufacturing the same. In particular, the compositions are prepared using thermokinetic compounding and provide improved properties as well as more efficient methods of manufacture.

This application is a continuation of U.S. patent application Ser. No.15/185,888, filed Jun. 17, 2016 which claims benefit of priority to U.S.Provisional Patent Application Ser. No. 62/180,998, filed Jun. 17, 2015,the entire contents of which are hereby incorporated by reference.

BACKGROUND 1. Field

The present disclosure relates in general to the field of pharmaceuticalpreparation and manufacturing, and more particularly, pharmaceuticalformulations of deferasirox using thermokinetic compounding.

2. Description of Related Art

The beneficial applications of many potentially therapeutic molecules isoften not fully realized either because they are abandoned duringdevelopment due to poor pharmacokinetic profiles, or because ofsuboptimal product performance. Alternatively, even if produced, thecost associated with formulating such molecules may create barriers totheir widespread use. Problems with formulation are often due to poorsolubility, resulting in poor bioavailability, increased expense, andultimately termination of the product. In recent years, thepharmaceutical industry has begun to rely more heavily on formulationalmethods for improving drug solubility. Consequently, advancedformulation technologies aimed at enhancing the dissolution propertiesof poorly water soluble drugs are becoming increasingly important tomodern drug delivery.

Deferasirox (DFX; marketed as Exjade®, Desirox®, Defrijet®, Desifer®,Jadenu®) is an oral iron chelator. Its main use is to reduce chroniciron overload in patients who are receiving long-term blood transfusionsfor conditions such as β-thalassemia and other chronic anemias. It isthe first oral medication approved in the USA for this purpose. It wasapproved by the United States Food and Drug Administration (FDA) inNovember, 2005. According to the FDA (May, 2007), renal failure andcytopenias have been reported in patients receiving deferasirox oralsuspension tablets. It is approved in the European Union by the EuropeanMedicines Agency (EMA) for children 6 years and older for chronic ironoverload from repeated blood transfusions.

The pharmacokinetics of orally administered DFX can be characterized ashighly variable with the most probable source of variability being itspH-dependent solubility. Weakly acidic compounds with low solubility ingastric fluid have a tendency to form insoluble aggregated structureswhen exposed to acidic media for extended durations absent the properdelivery system. When these insoluble structures are formed in thestomach, dissolution and absorption of the compound from the intestinallumen is substantially reduced despite relatively good solubility of thefree compound in intestinal fluids. As gastrointestinal pH can varywidely for a given individual from day-to-day and between individualsbased on nutritional and diseased states and/or the influence ofmedications, it is understood that the solubility properties of DFX canlead to erratic oral absorption, and consequently, diminishedtherapeutic outcomes.

Thus, while deferasirox has significant therapeutic value for chroniciron overload, it also exhibits extremely challenging properties withrespect to pharmaceutical formulation. As a result, there is a greatneed in to provide improved compositions and methods of manufacturingfor this drug.

SUMMARY

Thus, in accordance with the present disclosure, there is provided amethod of making a pharmaceutical composition comprising (a) providingcrystalline deferasirox (DFX) and one or more pharmaceuticallyacceptable excipients; (b) compounding the materials of step (a) in athermokinetic mixer at less than or equal to 200° C. for less than about300 seconds, wherein the thermokinetic compounding of DFX and the one ormore pharmaceutically acceptable excipients forms a melt blendedpharmaceutical composite. The pharmaceutical may comprise a secondactive pharmaceutical ingredient in addition to DFX, such as wherein thesecond active pharmaceutical ingredient is a second iron chelator, anagent used in the treatment or prevention of osteoporosis, ananti-fungal agent, or an agent that increases the rate of production ofred blood cells, such as amphotericin B, deferiprone, deferoxamine,erythropoietin, or risedronate. Step (b) may comprise compounding thematerials of step (a) in a thermokinetic mixer for less than about 240seconds, less than about 180 seconds, less than about 120 second, lessthan about 90 seconds, less than about 60 seconds, or less than about 30seconds.

The one or more pharmaceutically acceptable excipients may comprise apharmaceutical polymer, a surfactant, or one or more surfactants and oneor more polymer carriers. The composite may be an amorphous dispersion.The pharmaceutical polymer may comprise an agent selected from the groupconsisting of poly(vinyl acetate)-co-poly(vinylpyrrolidone) copolymer,ethylcellulose, hydroxypropylcellulose, cellulose acetate butyrate,poly(vinylpyrrolidone), poly(ethylene glycol), poly(ethylene oxide),poly(vinyl alcohol), hydroxypropyl methylcellulose,hydroxyethylcellulose, sodium carboxymethyl-cellulose,dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer, cellulose acetate phthalate,cellulose acetate trimelletate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer,hydroxypropylmethylcellulose acetate succinate and polyvinylcaprolactam-polyvinyl acetate-polyethylene glycol graft copolymer.

The one or more surfactants may comprise an agent selected from thegroup consisting of sodium dodecyl sulfate, dioctyl sodiumsulphosuccinate, polyoxyethylene (20) sorbitan monooleate, glycerolpolyethylene glycol oxystearate-fatty acid glycerol polyglycolesters-polyethylene glycols-glycerol ethoxylate, glycerol-polyethyleneglycol ricinoleate-fatty acid esters of polyethyleneglycol-polyethyleneglycols-ethoxylated glycerol, vitamin E TPGS and sorbitan laurate.

In particular cases, the surfactant comprises an agent selected from thegroup consisting of sodium dodecyl sulfate, dioctyl sodiumsulphosuccinate, polyoxyethylene (20) sorbitan monooleate, glycerolpolyethylene glycol oxystearate-fatty acid glycerol polyglycolesters-polyethylene glycols-glycerol ethoxylate, glycerol-polyethyleneglycol ricinoleate-fatty acid esters of polyethyleneglycol-polyethyleneglycols-ethoxylated glycerol, vitamin E TPGS, and sorbitan laurate, andthe pharmaceutical polymer comprises an agent selected from a groupconsisting of poly(vinyl acetate)-co-poly(vinylpyrrolidone) copolymer,ethylcellulose, hydroxypropylcellulose, cellulose acetate butyrate,poly(vinylpyrrolidone), poly(ethylene glycol), poly(ethylene oxide),poly(vinyl alcohol), hydroxypropyl methylcellulose,hydroxyethylcellulose, sodium carboxymethyl-cellulose,dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer, cellulose acetate phthalate,cellulose acetate trimelletate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer,hydroxypropylmethylcellulose acetate succinate and polyvinylcaprolactam-polyvinyl acetate-polyethylene glycol graft copolymer.

The composition may remain amorphous per x-ray diffraction analysisfollowing storage in an open container at about 40° C., relativehumidity of about 75%, at five weeks. The composition may comprise about30%-60% DFX, about 40%-60% DFX, about 30% DFX, 35% DFX, 40% DFX, 45%DFX, 50% DFX, 55% DFX, or 60% DFX. Step (b) may be performed at atemperature of about 100° C., about 125° C., about 150° C., about 180°C., or about 100° C. to 200° C. The composition may have a single glasstransition temperature. The purity of DFX in said composition may beabout 95%, is about 99%, is about 99.5%, or is about 95% to about 100%.The DFX to pharmaceutical polymer ratio may be about 2:8 to about 7:3,including about 3:7, about 4:6, about 1:1, or about 6:4.

The one or more pharmaceutically acceptable excipients may comprise aprocessing agent, such as a plasticizer. Alternatively, the compositionmay not contain a processing agent/plasticizer. The one or morepharmaceutically acceptable excipients comprises a water solublepharmaceutical polymer, such as a water soluble polymer selected from agroup consisting of poly(vinyl acetate)-co-poly(vinylpyrrolidone)copolymer, poly(vinylpyrrolidone), cellulose acetate phthalate,poly(vinyl acetate) phthalate, hydroxypropylmethylcellulose phthalate,poly(methacrylate ethylacrylate) (1:1) copolymer, poly(methacrylatemethylmethacrylate) (1:1) copolymer, poly(methacrylatemethylmethacrylate) (1:2) copolymer, hydroxypropyl methylcellulose,hydroxypropylmethylcellulose acetate succinate, poly(vinyl alcohol), andpolyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graftcopolymer.

The one or more pharmaceutically acceptable excipients may comprise across-linked pharmaceutical polymer, such as carbomer, crospovidone, orcroscarmellose sodium. The one or more pharmaceutically acceptableexcipients may comprise a pharmaceutical polymer of high melt viscosity.The one or more pharmaceutically acceptable excipients may comprise athermally labile pharmaceutical polymer. The one or morepharmaceutically acceptable excipients may comprise poly(methacrylateethylacrylate) (1:1) copolymer or poly(vinylacetate)-co-poly(vinylpyrrolidone). The one or more pharmaceuticallyacceptable excipients may comprise poly(methacrylate ethylacrylate)(1:1) copolymer and poly(vinyl acetate)-co-poly(vinylpyrrolidone). Theone or more pharmaceutically acceptable excipients may comprisepoly(vinyl acetate)-co-poly(vinylpyrrolidone) andhydroxypropylmethylcellulose acetate succinate.

In another embodiment, there is provided a pharmaceutical compositioncomprising an amorphous dispersion of deferasirox (DFX) and one or morepharmaceutically acceptable excipients. The composition may have asingle glass transition temperature. The composition may remainamorphous per x-ray diffraction analysis following storage in an opencontainer at about 40° C., relative humidity of about 75%, at fiveweeks. The one or more pharmaceutically acceptable excipients maycomprise one or more polymers, a processing agent and/or a surfactant.The composition may exhibit a drug loading of about 30%-60% DFX, about40%-60% DFX, about 30% DFX, 35% DFX, 40% DFX, 45% DFX, 50% DFX, 55% DFX,or 60% DFX. The composition may have less than about 1.0% degradationproducts of deferasirox (DFX). The DFX to pharmaceutical polymer ratiomay be about 2:8 to about 7:3, including about 3:7, about 4:6, about1:1, or about 6:4. The purity of DFX used in said composition may beabout 95%, is about 99%, is about 99.5%, or is about 95% to about 100%.The purity of said composition may be about 95%, is about 99%, is about99.5%, or is about 95% to about 100%. The pharmaceutical composition maycomprise about 90 mg DFX, about 125 mg DFX, about 250 mg DFX, about 360mg DFX, or about 500 mg DFX.

The pharmaceutical composition may comprise a second activepharmaceutical ingredient in addition to DFX, such as wherein the secondactive pharmaceutical ingredient is a second iron chelator, an agentused in the treatment or prevention of osteoporosis, an anti-fungalagent, or an agent that increases the rate of production of red bloodcells, such as amphotericin B, deferiprone, deferoxamine,erythropoietin, or risedronate.

The one or more pharmaceutical polymers may comprise an agent selectedfrom the group consisting of poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, ethylcellulose,hydroxypropylcellulose, cellulose acetate butyrate,poly(vinylpyrrolidone), poly(ethylene glycol), poly(ethylene oxide),poly(vinyl alcohol), hydroxypropyl methylcellulose, ethylcellulose,hydroxyethylcellulose, sodium carboxymethyl-cellulose,dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer, cellulose acetate phthalate,cellulose acetate trimelletate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer,hydroxypropylmethylcellulose acetate succinate and polyvinylcaprolactam-polyvinyl acetate-polyethylene glycol graft copolymer.

The surfactant may comprises an agent selected from the group consistingof sodium dodecyl sulfate, dioctyl sodium sulphosuccinate,polyoxyethylene (20) sorbitan monooleate, glycerol polyethylene glycoloxystearate-fatty acid glycerol polyglycol esters-polyethyleneglycols-glycerol ethoxylate, glycerol-polyethylene glycolricinoleate-fatty acid esters of polyethyleneglycol-polyethyleneglycols-ethoxylated glycerol, vitamin E TPGS, and sorbitan laurate, andthe pharmaceutical polymer comprises an agent selected from a groupconsisting of poly(vinylpyrrolidone), hydroxypropylcellulose, poly(vinylalcohol), hydroxypropyl methylcellulose, hydroxyethylcellulose, andsodium carboxymethyl-cellulose, and polyvinyl caprolactam-polyvinylacetate-polyethylene glycol graft copolymer.

The pharmaceutical composition may or may not contain a processingagent, such as a plasticizer. The composition may be a composite and maybe a homogenous, heterogeneous, or heterogeneously homogenouscomposition. The one or more pharmaceutical polymers is/are a watersoluble polymer(s), such as water soluble polymers selected from thegroup consisting of poly(vinyl acetate)-co-poly(vinylpyrrolidone)copolymer, poly(vinylpyrrolidone), cellulose acetate phthalate,poly(vinyl acetate) phthalate, hydroxypropylmethylcellulose phthalate,poly(methacrylate ethylacrylate) (1:1) copolymer, poly(methacrylatemethylmethacrylate) (1:1) copolymer, poly(methacrylatemethylmethacrylate) (1:2) copolymer, hydroxypropyl methylcellulose,hydroxypropylmethylcellulose acetate succinate, poly(vinyl alcohol), andpolyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graftcopolymer. The DFX to water soluble pharmaceutical polymer ratio may beabout 1:2, about 2:3, about 1:1. About 3:2 or about 2:1. The one or morepharmaceutically acceptable excipients may comprise a pharmaceuticalpolymer of high melt viscosity. The one or more pharmaceuticallyacceptable excipients may comprise a thermally labile pharmaceuticalpolymer.

The pharmaceutical composition may exhibit a peak solubility of the DFXin the composition of greater than 400-600 μg/mL, in an aqueous bufferwith a pH range of 4 to 8, such as 400, 425, 450, 475, 500, 525, 550,575 or 600 μg/mL. The peak solubility of the DFX and the referencestandard DFX after an 8 hr dissolution test in an aqueous buffer with apH range of 4 to 8 may have a ratio of greater than 4:1. The AUC of theDFX in the composition and AUC of the reference standard DFX may have aratio that is greater than 4:3, such as 5:3, 2:1, 7:3 and 4:1. Thepharmaceutical composition may have at least about 97% drug potency ofdeferasirox (DFX) as compared to the unprocessed deferasirox (DFX).

The pharmaceutical composition may be formulated as an oral dosage form,such as a tablet, a capsule, or a sachet, wherein the tablet may be around flat tablet, a round concave tablet, an elongated tablet, or aminitab. The oral dosage form may be an extended release form or animmediate release form. The oral dosage form is a disintegrating tabletor an eroding tablet.

Also provided is pharmaceutical composition produced by a processcomprising the steps of (a) providing crystalline deferasirox (DFX) andone or more pharmaceutically acceptable excipients; (b) compounding thematerials of step (a) in a thermokinetic mixer for less than about 300seconds and at less than or equal to about 200° C., wherein thethermokinetic compounding of DFX and the one or more pharmaceuticallyacceptable excipients forms a melt blended pharmaceutical composition.The one or more pharmaceutically acceptable excipients may include oneor more water soluble pharmaceutical polymers, such as poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, poly(vinylpyrrolidone),cellulose acetate phthalate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose acetate succinate,poly(vinyl alcohol), or polyvinyl caprolactam-polyvinylacetate-polyethylene glycol graft copolymer. The composition may be ananocomposite, or may be a partially or wholly amorphous dispersion.Step (b) may comprise compounding the materials of step (a) in athermokinetic mixer for less than about 240 seconds, less than about 180seconds, less than about 120 second, less than about 90 seconds, lessthan about 60 seconds, or less than about 30 seconds.

The pharmaceutical composition may comprise a surfactant. Thepharmaceutical composition may be co-processed with second activepharmaceutical ingredient, such as wherein the second activepharmaceutical ingredient is a second iron chelator, an agent used inthe treatment or prevention of osteoporosis, an anti-fungal agent, or anagent that increases the rate of production of red blood cells, such asamphotericin B, deferiprone, deferoxamine, erythropoietin, orrisedronate.

The pharmaceutical composition may remain amorphous per x-raydiffraction analysis following storage in an open container at about 40°C., relative humidity of about 75%, at five weeks. The pharmaceuticalcomposition may comprise about 30%-60% DFX, about 40%-60% DFX, about 30%DFX, 35% DFX, 40% DFX, 45% DFX, 50% DFX, 55% DFX, or 60% DFX. The purityof the composition may be about 95%, is about 99%, is about 99.5%, or isabout 95% to about 100%. The purity of DFX used in said composition maybe about 95%, is about 99%, is about 99.5%, or is about 95% to about100%. Step (b) may be performed at a temperature of about 100° C., about125° C., about 150° C., about 180° C., or about 100° C. to 200° C. Thecomposition may have a single glass transition temperature.

In addition, there is provided a pharmaceutical composition comprisingan amorphous dispersion of deferasirox (DFX) and one or morepharmaceutically acceptable excipients thermally processed into acomposite, wherein the composite has less than about 1.0% degradationproducts of deferasirox (DFX). The pharmaceutical composition has lessthan about 0.5% degradation products of DFX, less than about 0.25%degradation products of DFX, or less than about 0.1% degradationproducts of DFX. The pharmaceutical composition may not comprise aprocessing agent. The composition may be formulated as an oral dosageform, such as a tablet, a capsule, sachet or a pellet. The tablet may bea round flat tablet, a round concave tablet, an elongated tablet, or aminitab. The oral dosage form may be an extended release form or animmediate release form. The oral dosage form is a disintegrating tabletor an eroding tablet.

The composition may remain amorphous per x-ray diffraction analysisfollowing storage in an open container at about 40° C., relativehumidity of about 75%, at five weeks. The composition may comprise about30%-60% DFX, about 40%-60% DFX, about 30% DFX, 35% DFX, 40% DFX, 45%DFX, 50% DFX, 55% DFX, or 60% DFX. The pharmaceutical composition mayexhibit a peak solubility of the DFX in the composition of greater than400-600 μg/mL, in an aqueous buffer with a pH range of 4 to 8, such as400, 425, 450, 475, 500, 525, 550, 575 or 600 μg/mL. The peak solubilityof the DFX and the reference standard DFX after an 8 hr dissolution testin an aqueous buffer with a pH range of 4 to 8 may have a ratio ofgreater than 4:1. The AUC of the DFX in the composition and AUC of thereference standard DFX may have a ratio that is greater than 4:3.

The one or more pharmaceutically acceptable excipients may include oneor more water soluble pharmaceutical polymers, such as poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, poly(vinylpyrrolidone),cellulose acetate phthalate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose acetate succinate,poly(vinyl alcohol), or polyvinyl caprolactam-polyvinylacetate-polyethylene glycol graft copolymer. The DFX to water solublepharmaceutical polymer ratio may be about 1:2, about 2:3, about 1:1,about 3:2, or about 2:1. The pharmaceutical composition may compriseabout 90 mg DFX, about 125 mg DFX, about 250 mg DFX, about 360 mg DFX,or about 500 mg DFX. The composition may have a single glass transitiontemperature.

In further embodiments, there are provided:

-   -   a pharmaceutical composition comprising an amorphous dispersion        of deferasirox (DFX) and one or more pharmaceutically acceptable        excipients thermally processed into a composite, wherein the        composition which does not have substantial degradation of        deferasirox (DFX) and each excipient;    -   a pharmaceutical composition comprising an amorphous dispersion        of deferasirox (DFX) and one or more pharmaceutically acceptable        excipients thermally processed into a composite, wherein the        composition which has less than about 1.0% degradation products        of deferasirox (DFX), does not have substantial degradation of        each excipient, and the composition does not comprise a        processing agent;    -   a pharmaceutical composition comprising an amorphous dispersion        of deferasirox (DFX) and one or more pharmaceutically acceptable        excipients thermally processed into a composite, wherein the        composition which has less than about 1.0% degradation products        of deferasirox (DFX), and the composition does not comprise a        processing agent;    -   a pharmaceutical composition comprising an amorphous dispersion        of deferasirox (DFX) and one or more pharmaceutically acceptable        excipients thermally processed into a composite, in which the        composite exhibits a single glass transition temperature, and        which does not have substantial degradation of deferasirox        (DFX), while a formulation of deferasirox (DFX) and identical        pharmaceutically acceptable excipients processed thermally by a        process other than thermokinetic compounding exhibits two or        more glass transition temperatures; and    -   a pharmaceutical composition comprising an amorphous dispersion        of deferasirox (DFX) and one or more pharmaceutically acceptable        excipients thermally processed into a composite, in which the        glass transition temperature is significantly higher than the        glass transition temperature of a formulation of deferasirox        (DFX) and identical pharmaceutically acceptable excipients        processed thermally by a process other than thermokinetic        compounding, and which does not have substantial degradation of        deferasirox (DFX), and wherein the composition does not comprise        a processing agent.

The pharmaceutical composition of any of the preceding embodiments mayhave at least about 97% drug potency of deferasirox (DFX) as compared tothe unprocessed deferasirox (DFX). The pharmaceutical composition may beformulated as an oral dosage form. The oral dosage form may be a tablet,a capsule, sachet or a pellet. The tablet may be a round flat tablet, around concave tablet, an elongated tablet, or a minitab. The oral dosageform may be an extended release form or an immediate release form. Theoral dosage form may be a disintegrating tablet or an eroding tablet.

The pharmaceutical composition may remain amorphous per x-raydiffraction analysis following storage in an open container at about 40°C., relative humidity of about 75%, at five weeks. The composition maycomprise about 30%-60% DFX, about 40%-60% DFX, about 30% DFX, 35% DFX,40% DFX, 45% DFX, 50% DFX, 55% DFX, or 60% DFX. The pharmaceuticalcomposition may exhibit a peak solubility of the DFX in the compositionof greater than 400-600 μg/mL, in an aqueous buffer with a pH range of 4to 8, such as 400, 425, 450, 475, 500, 525, 550, 575 or 600 μg/mL. Thepeak solubility of the DFX and the reference standard DFX after an 8 hrdissolution test in an aqueous buffer with a pH range of 4 to 8 may havea ratio of greater than 4:1. The AUC of the DFX in the composition andAUC of the reference standard DFX may have a ratio that is greater than4:3.

The one or more pharmaceutically acceptable excipients may include oneor more water soluble pharmaceutical polymers, such as poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, poly(vinylpyrrolidone),cellulose acetate phthalate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose acetate succinate,poly(vinyl alcohol), or polyvinyl caprolactam-polyvinylacetate-polyethylene glycol graft copolymer. The DFX to water solublepharmaceutical polymer ratio may be about 1:2, about 2:3, about 1:1,about 3:2, or about 2:1. The pharmaceutical composition may compriseabout 90 mg DFX, about 125 mg DFX, about 250 mg DFX, about 360 mg DFX,or about 500 mg DFX.

In addition, novel pharmaceutical compositions or composites made by TKCand discussed above may be further processed according to methods wellknown to those of skill in the art, including but not limited tocompression molding, tablet compression, capsule filling, film-coating,or injection molding into a final product. In certain embodiments, thecomposite made by TKC is the final product. Another embodiment isdirected to addition of DFX and one or more pharmaceutically acceptableexcipients in a ratio of about 1:2, 1:2.5, 1:3, 1:3.5, 1:4, 1:4.5, 1:5,1:5.5, 1:6, 1:6.5, 1:7, 1:7.5, 1:8, 1:8.5, 1:9, 1:9.5, or 1:10. Yetanother embodiment is directed to addition of DFX and one or morepharmaceutically acceptable adjuvants in a ratio of about 1:2, 1:2.5,1:3, 1:3.5, 1:4, 1:4.5, 1:5, 1:5.5, 1:6, 1:6.5, 1:7, 1:7.5, 1:8, 1:8.5,1:9, 1:9.5, 1:10, 1:15, 1:20 1:25, 1:30, 1:40, 1:50, 1:60, 1:70, 1:80,1:90, 1:100, 1:150, 1:200, 1:300, 1:400 or 1:500. An additionalembodiment is directed to addition of DFX and one or more additionalactive pharmaceutical ingredient (“API”). The ratio of DFX to other APImay be 20:1, 16:1, 6:1, 2:1, 1:1, 1:2, 1:6, 1:16, 1:20.

The thermokinetic processing may be conducted in a thermokineticchamber. A thermokinetic chamber is an enclosed vessel or chamber inwhich TKC occurs. In one aspect, the average temperature inside thechamber is ramped up to a pre-defined final temperature over theduration of processing to achieve optimal thermokinetic mixing of DFXand the one or more pharmaceutically acceptable excipients, adjuvants,additional APIs, or any combination thereof, into a composite. Inanother aspect, multiple speeds are used during a single, rotationallycontinuous TKC operation to achieve optimal thermokinetic mixing of DFXand one or more pharmaceutically acceptable excipients, adjuvants,additional APIs, or any combination thereof, into a composite withminimal thermal degradation. The length of processing and exposure toelevated temperatures or speeds during thermokinetic mixing willgenerally be below the thermal sensitivity threshold of DFX,excipient(s), adjuvant(s), or additional API(s). In another aspect, thethermokinetic processing is performed at an average temperature at orbelow the melting point of DFX, excipient(s), adjuvant(s), or additionalAPI(s); the thermokinetic processing is performed at an averagetemperature at or below the glass transition temperature of DFX,excipient(s), adjuvant(s), or additional API(s); or the thermokineticprocessing is performed at an average temperature at or below the moltentransition point of DFX, excipient(s), adjuvant(s), or additionalAPI(s).

In certain embodiments, the thermokinetic processing substantiallyeliminates DFX, excipient, adjuvant or additional API degradation. Forexample, TKC may generate compositions and composites with less thanabout 2.0%, 1.0%, 0.75%, 0.5%, 0.1%, 0.05%, or 0.01% degradationproducts of DFX, adjuvant, excipient or additional API. In otherembodiments, TKC may generate compositions with a minimum of at leastabout 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.9% drugpotency with respect to DFX. Examples of TKC may be performed for lessthan 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 75, 100, 120, 150,180, 240 and 300 seconds. Generally, TKC may be performed for less than5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 75, 100, 120, 150, 180,240 and 300 seconds, and any ranges therein. In certain embodiments, theDFX has an amorphous morphology.

In certain embodiments, the formulations may provide for enhancedsolubility of DFX through the mixing of DFX with pharmaceuticallyacceptable polymers, carriers, surfactants, excipients, adjuvants or anycombination thereof. Thus, for example, compositions which displayenhanced solubility are comprised of DFX and a surfactant orsurfactants, DFX and a pharmaceutical carrier (thermal binder) orcarriers, or DFX and a combination of a surfactant and pharmaceuticalcarrier or surfactants and carriers.

A further embodiment of the present disclosure is a pharmaceuticalcomposition comprising DFX and one or more pharmaceutically acceptableexcipients, adjuvants, additional APIs, or a combination thereof,wherein greater than about 80% of the dose is dissolved within two hoursafter a media change from aqueous media of about pH 1.2 to an aqueousbuffer of pH between 4 and 8.

A further embodiment of the present disclosure is a pharmaceuticalcomposition comprising DFX and one or more pharmaceutically acceptableexcipients, adjuvants, additional APIs, or a combination thereof,wherein a ratio of peak solubility of DFX in the composition over peaksolubility of the reference standard DFX, is greater than about 2:1,3:1, about 4:1, about 5:1, about 6:1, about 7:1, about 8:1, about 9:1,or about 10:1.

A further embodiment of the present disclosure is a pharmaceuticalcomposition comprising DFX and one or more pharmaceutically acceptableexcipients, adjuvants, or additional APIs, wherein AUC of the DFX in thecomposition and AUC of the reference standard DFX, when delivered orallyhave a ratio that is greater than about 4:3, 5:3, 2:1, or about 5:1.

A further embodiment of the present disclosure is a method offormulating a pharmaceutical composition comprising DFX and one or morepharmaceutically acceptable excipients, adjuvants, additional APIs, orany combination thereof, by TKC to increase bioavailability of the DFX,comprising thermokinetic processing of the DFX with the one or morepharmaceutically acceptable excipients, adjuvants, additional APIs, orany combination thereof until melt blended into a composite.

A further embodiment of the present disclosure is a pharmaceuticalcomposition comprising DFX and one or more pharmaceutically acceptableexcipients, adjuvants, additional APIs, or any combination thereof,wherein the composition is a homogenous, heterogenous, orheterogeneously homogenous composition which has a single glasstransition temperature.

A further embodiment of the present disclosure is a pharmaceuticalcomposition comprising DFX and one or more pharmaceutically acceptableexcipients, adjuvants, additional APIs, or any combination thereof,processed into a composite, wherein the composite is a homogenous,heterogenous, or heterogeneously homogenous composition which has a lessthan about 1.0%, about 2%, about 3%, about 4% or about 5%, about 6%,about 7%, about 8%, about 9%, or about 10% degradation products of theDFX.

A further embodiment of the present disclosure is particle sizereduction of DFX in an excipient carrier system in which DFX is notmiscible, not compatible, or not miscible or compatible. Particle sizereduction can be achieved by attrition of the API particles according tothe mechanical forces imparted by the TKC process with simultaneousmixing with the molten excipient carrier. Particle size reduction canalso be achieved by melting DFX with the carrier at elevated temperatureby TKC processing and subsequently forcing recrystallization of DFX asfine particles in the carrier upon quenching. By this method, asecondary annealing step may also be required to bring therecrystallization process to completion. In one aspect, DFX is in theform of a nanocomposite with the excipient carrier system.

The novel pharmaceutical compositions or composites made by TKC anddisclosed herein may be administered to a treat a mammal, includingwithout limitation a human patient or subject, to reduce chronic ironoverload in subjects, for example in subjects who are receivinglong-term blood transfusions for conditions such as a blood disorder,including but not limited to β-thalassemia, non-transfusion-dependentthalassemia (NTDT) syndrome and other chronic anemias. The chronic ironoverload can be due to blood transfusions, particularly in patients 2years of age and older. In certain embodiments, such compositions orcomposites may be used in a method of treating a subject who experiencesa suboptimal or inadequate response to maximum approved doses ofcurrently available DFX formulations (e.g., Exjade®, Desirox®,Defrijet®, Desifer®, Jadenu®). Such suboptimal or inadequate responsemay result in such subjects not achieving negative iron balance.Subjects that may be treated by such compositions or composites includechildren, juveniles, young adults and adults of any age. In particularembodiments, the bioavailability of such compositions or composites areindependent of a food effect. For example, the bioavailable of suchcompositions or composites are independent of any consumption by asubject of a high fat meal prior to, with, or shortly afteradministration of such compositions or composites. The administration ofthe pharmaceutical composition to the mammal may result in an AUC valuethat is statistically equivalent regardless of whether the subject hasfasted or has consumed a high fat meal immediately prior toadministration of the composition.

Also provided are pharmaceutical compositions comprising an amorphousdispersion of deferasirox (DFX) and one or more pharmaceuticallyacceptable excipients thermally processed into a composite bythermokinetic compounding, in which the composite is a single phase,amorphous composite, wherein at least one of the pharmaceuticallyacceptable excipients is immiscible with DFX when thermally processed bya process other than thermokinetic compounding.

In particular, there is provided a method of treating a subject forchronic iron overload in a subject who experiences a suboptimal orinadequate response to non-amorphous dispersions or crystalline forms ofdeferasirox (DFX) comprising administering to the subject apharmaceutical composition comprising an amorphous dispersion of DFX andone or more pharmaceutically acceptable excipients. The amorphousdispersion of DFX may be thermally processed into a composite bythermokinetic compounding, and the non-amorphous dispersion orcrystalline form of DFX may be thermally processed by a process otherthan thermokinetic compounding. The may have a blood disorder, such asβ-thalassemia, non-transfusion-dependent thalassemia (NTDT) syndrome orchronic anemia. The bioavailability of the amorphous dispersion of DFXmay be independent of any food effect, such as a food effect fromconsuming a high fat meal.

Still further there is provided a pharmaceutical composition comprisingdeferasirox (DFX) and one or more pharmaceutically acceptable excipientsthermally processed into a composite by thermokinetic compounding,wherein administration of the composition to fasted human subjectsprovides an AUC_(0-T) value is at least 15% greater when compared toadministration of a pharmaceutical composition comprising DFX and one ormore pharmaceutically acceptable excipients thermally processed by aprocess other than thermokinetic compounding. The AUC_(0-T) value may beat least 25% greater.

Also provided is a pharmaceutical composition comprising deferasirox(DFX) and one or more pharmaceutically acceptable excipients thermallyprocessed into a composite by thermokinetic compounding, whereinadministration of the composition to human subjects provides an AUCincrease of at least 50% when compared to administration of apharmaceutical composition comprising DFX and one or morepharmaceutically acceptable excipients thermally processed by a processother than thermokinetic compounding.

Also provided is a pharmaceutical composition comprising deferasirox(DFX) and one or more pharmaceutically acceptable excipients thermallyprocessed into a composite by thermokinetic compounding, whereinadministration of the composition to fasted human subjects provides aC_(max) standard deviation of less than 30% and an AUC_(0-∞) standarddeviation of less than 35%.

BRIEF DESCRIPTION OF THE DRAWINGS

The patent or application file contains at least one drawing executed incolor. Copies of this patent or patent application publication withcolor drawing(s) will be provided by the Office upon request and paymentof the necessary fee.

The following drawings form part of the present specification and areincluded to further demonstrate certain aspects of the presentdisclosure. The disclosure may be better understood by reference to oneor more of these drawings in combination with the detailed descriptionof specific embodiments presented herein.

FIG. 1. KinetiSol® processing profile of lot 13-004-50 (40% DFX, 60%Eudragit L100-55).

FIG. 2. KinetiSol® processing profile of lot 13-004-79 (50% API, 50%Copovidone).

FIG. 3. XRD analysis of Lot 13-004-37 (40% DFX, 60% Copovidone). The redline represents the initial state of the product and the green linerepresents the product following 2 months storage at 40° C., 75% RH(open containers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 4. XRD analysis of Lot 13-004-38 (40% DFX, 60% Copovidone). The redline represents the initial state of the product and the green linerepresents the product following 2 months storage at 40° C., 75% RH(open containers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 5. XRD analysis of Lot 13-004-58 (50% DFX, 50% Copovidone). The redline represents the initial state of the product and the green linerepresents the product following 5 weeks storage at 40° C., 75% RH (opencontainers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 6. XRD analysis of Lot 13-004-79 (50% DFX, 50% Copovidone). The redline represents the initial state of the product and the green linerepresents the product following 4 weeks storage at 40° C., 75% RH (opencontainers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 7. XRD analysis of Lot 13-004-40 (60% DFX, 40% Copovidone). The redline represents the initial state of the product and the green linerepresents the product following 2 months storage at 40° C., 75% RH(open containers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 8. XRD analysis of Lot 13-004-41 (20% DFX, 80% HPMCAS-LF). The redline represents the initial state of the product and the green linerepresents the product following 3 weeks storage at 40° C., 75% RH (opencontainers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 9. XRD analysis of Lot 13-004-50 (40% DFX, 60% Eudragit L100-55).The red line represents the initial state of the product and the greenline represents the product following 8 weeks storage at 40° C., 75% RH(open containers). The absence of peaks corresponding to crystalline DFXdemonstrates that the drug was substantially amorphous in theformulation at both conditions.

FIG. 10. XRD analysis of Lot 13-004-57 (40% DFX, 30% Eudragit L100-55,30% Copovidone). The red line represents the initial state of theproduct and the green line represents the product following 5 weeksstorage at 40° C., 75% RH (open containers). The absence of peakscorresponding to crystalline DFX demonstrates that the drug wassubstantially amorphous in the formulation at both conditions.

FIG. 11. XRD analysis of Lot 13-004-60 (50% DFX, 25% Eudragit L100-55,25% Copovidone). The red line represents the initial state of theproduct and the green line represents the product following 4 weeksstorage at 40° C., 75% RH (open containers). The absence of peakscorresponding to crystalline DFX demonstrates that the drug wassubstantially amorphous in the formulation at both conditions.

FIG. 12. XRD analysis of Lot 13-004-47 (50% DFX, 33.33% Copovidone,16.67% HPMCAS-LF). The red line represents the initial state of theproduct and the green line represents the product following 8 weeksstorage at 40° C., 75% RH (open containers). The absence of peakscorresponding to crystalline DFX demonstrates that the drug wassubstantially amorphous in the formulation at both conditions.

FIG. 13. Dissolution profiles of comparators (Jadenu® and Exjade®), pureAPI and amorphous intermediates in capsules. Jadenu®—360 mg tablet ofJadenu®; Jadenu® ×2—Two 360 mg capsules of Jadenu®, 720 mg total;API—Two capsules of 180 mg neat API, 360 mg total; 37—Two capsulescontaining lot 13-004-37 (40% API, 60% Copovidone) amorphousintermediate, equivalent to 360 mg DFX total; 40—Two capsules containinglot 13-004-40 (60% API, 40% Copovidone) amorphous intermediate,equivalent to 360 mg DFX total; 47—Two capsules containing lot 13-004-47(50% API, 33.33% Copovidone, 16.67% HPMCAS L) amorphous intermediate,equivalent to 360 mg DFX total; 50—Two capsules containing lot 13-004-50(40% API, 60% Eudragit L100-55) amorphous intermediate, equivalent to360 mg DFX total; 57—Two capsules containing lot 13-004-57 (40% API, 30%Copovidone, 30% Eudragit L100-55) amorphous intermediate, equivalent to360 mg DFX total; 58—Two capsules containing lot 13-004-58 (50% API, 50%Copovidone) amorphous intermediate, equivalent to 360 mg DFX total;39—Two capsules containing lot 13-004-39 (60% API, 40% Copovidone)partially crystalline intermediate, equivalent to 360 mg DFX total.

FIG. 14. Dissolution profiles of disintegrating and eroding tabletscontaining amorphous intermediates. 73—Tablet lot 13.004.73,disintegrating tablet containing lot 13-004-58 (50% API, 50% Copovidone)amorphous intermediate; 74—Tablet lot 13.004.74, eroding tabletcontaining lot 13-004-58 (50% API, 50% Copovidone) amorphousintermediate; 75—Tablet lot 13.004.75, disintegrating tablet containinglot 13-004-60 (50% API, 25% Copovidone, 25% Eudragit L100-55) amorphousintermediate; 76—Tablet lot 13.004.76, eroding tablet containing lot13-004-60 (50% API, 25% Copovidone, 25% Eudragit L100-55) amorphousintermediate; 77—Tablet lot 13.004.77, disintegrating tablet containinglot 13-004-50 (40% API, 60% Eudragit L100-55) amorphous intermediate;78—Tablet lot 13.004.78, eroding tablet containing lot 13-004-50 (40%API, 60% Eudragit L100-55) amorphous intermediate.

FIG. 15. Dissolution profiles of eroding tablets with differentgeometries containing lot 13-004-40 (60% API, 40% Copovidone) amorphousintermediate. Elongated: Tablet lot 13.004.84 #1, one tablet; Circular:Tablet lot 13.004.84 #2, one tablet; Elongated w/Mannitol: Tablet lot13.004.84 #3, one tablet; Minitabs: Tablet lot 13.004.84 #4, threetablets; Minitabs in Capsule: Tablet lot 13.004.84 #4, three tabletsfilled into a size 00 capsule; 50% DFX AI tablets: Reference; tablet lot13.004.74, one tablet containing lot 13-004-58 (50% API, 50% Copovidone)amorphous intermediate.

FIG. 16. Plasma concentration versus time plots for Treatment 1(Formulation 30011, fasted), Treatment 2 (Jadenu® reference, fasted),Treatment 4 (Formulation 30012, fasted) and Treatment 5 (Jadenu®reference, fasted).

FIG. 17. Individual subjects' plasma DFX concentration versus timecurves for Treatment 1 (Formulation 30011, fasted) versus Treatment 2(Jadenu® reference, fasted).

DETAILED DESCRIPTION

Although making and using various embodiments of the present disclosureare discussed in detail below, it should be appreciated that the presentdisclosure provides many inventive concepts that may be embodied in awide variety of contexts. The specific aspects and embodiments discussedherein are merely illustrative of ways to make and use the disclosure,and do not limit the scope of the disclosure.

Described herein are improved deferasirox (DFX) compositions and methodsfor their manufacture. The methods permit thermal processing to producean amorphous solid dispersion of DFX with high amorphous drug loading.The high melting point of DFX precludes the use of other thermalprocessing technologies, namely melt extrusion, for the production theamorphous dispersion compositions described herein because theprocessing temperatures required to achieve high-drug load DFX amorphousdispersions would exceed the degradation temperatures of the polymers.Moreover, the prolonged processing times of a typical melt extrusionprocess at the temperatures required to form a high drug load DFXamorphous dispersion are expected to result in the generation of highdrug-related impurities content (>1%). Moreover, the non-solvent natureof the methods eliminates issues associated with solvent-basedprocesses, namely, cost, safety, and environmental waste. Further, themethods are vastly more efficient than the leading solvent-basedprocesses; namely, spray drying; owing to the limited solubility of DFXin common volatile organic solvents, which leads to copious amounts ofsolvent evaporation to obtain a relatively small amount of solids. Themethods of the current disclosure permit unique amorphous dispersioncompositions of DFX with an array of pharmaceutical carriers includingionic, non-ionic, cross-linked, highly viscous, and thermally labilepharma polymers with additional advantages in drug manufacture anddelivery.

Using the processing methods described herein, enhanced dissolutionkinetics and mitigation of pH-dependent solubility of DFX by theamorphous solid dispersion formulations are achieved, resulting inimproved pharmacokinetic (PK) profiles relative to compositionscontaining crystalline DFX. For example, increased total oral absorption(AUC) of DFX, increased peak plasma concentrations (C_(max)) of DFX,reduced PK variability, mitigated food effect, complete and consistentabsorption in human subjects relative to compositions containingcrystalline DFX, and enhanced DFX efficacy in patients that poorlyabsorb crystalline forms of the compound are all achieved.

Tens of thousands of transfusion-dependent (e.g., thalassemia) patientsworldwide suffer from chronic iron overload and its potentially fatalcomplications. DFX, commercially available in many countries since 2006,has been a major advance for patients with transfusional hemosiderosis,a proportion of patients have suboptimal response to the maximumapproved doses (30 mg/kg per day), and do not achieve negative ironbalance. Chirnomas et al. (2009) reported a prospective study of oraldeferasirox pharmacokinetics (PK), comparing 10 transfused patients withinadequate deferasirox response (rising ferritin trend or rising liveriron on deferasirox doses >30 mg/kg per day) with controltransfusion-dependent patients with adequate response. Patients withinadequate response to deferasirox had significantly lower systemic drugexposure compared with control patients. C_(max), volume ofdistribution/bioavailability (Vd/F), and elimination half-life(t_((1/2))) were not different between the groups, suggestingbioavailability as the likely discriminant.

Since the DFX dissolution and solubility enhancement achieved with thecompositions described herein are superior to the currently availablecompositions, these new formulations will enable therapeuticconcentrations to be achieved at substantially lower doses in patientsthat have been previously identified to be inadequate responders to DFXwhen administered orally in a substantially crystalline form. This willimprove the efficacy of DFX in these patients by achieving therapeuticblood levels at reasonable doses and enabling more rapid and consistentdose titration, as well as improve the safety profile of DFX in thesepatients as these formulations will substantially reduce theadministered dose and consequently the frequency and severity of adverseevents.

These and other aspects of the disclosure are discussed in detail below.

I. DEFINITIONS

To facilitate the understanding of this disclosure, a number of termsare defined below. Terms defined herein have meanings as commonlyunderstood by a person of ordinary skill in the areas relevant to thepresent disclosure. Terms such as “a”, “an” and “the” are not intendedto refer to only a singular entity, but include the general class ofwhich a specific example may be used for illustration.

With regard to the values or ranges recited herein, the term “about” isintended to capture variations above and below the stated number thatmay achieve substantially the same results as the stated number. In thepresent disclosure, each of the variously stated ranges is intended tobe continuous so as to include each numerical parameter between thestated minimum and maximum value of each range. For example, a range ofabout 1 to about 4 includes about 1, 1, about 2, 2, about 3, 3, about 4,and 4. The terminology herein is used to describe specific embodimentsof the disclosure, but their usage does not delimit the disclosure,except as outlined in the claims.

All publications and patent applications mentioned in the specificationare indicative of the level of skill of those skilled in the art towhich this disclosure pertains. All publications and patent applicationsare herein incorporated by reference to the same extent as if eachindividual publication or patent application was specifically andindividually indicated to be incorporated by reference.

The use of the word “a” or “an” when used in conjunction with the term“comprising” in the claims and/or the specification may mean “one,” butit is also consistent with the meaning of “one or more,” “at least one,”and “one or more than one.” The use of the term “or” in the claims isused to mean “and/or” unless explicitly indicated to refer toalternatives only or the alternatives are mutually exclusive, althoughthe disclosure supports a definition that refers to only alternativesand “and/or.” Throughout this application, the term “about” is used toindicate that a value includes the inherent variation of error for thedevice, the method being employed to determine the value, or thevariation that exists among the study subjects.

As used in this specification and claims, the words “comprising” (andany form of comprising, such as “comprise” and “comprises”), “having”(and any form of having, such as “have” and “has”), “including” (and anyform of including, such as “includes” and “include”) or “containing”(and any form of containing, such as “contains” and “contain”) areinclusive or open-ended and do not exclude additional, unrecitedelements or method steps.

The term “or combinations thereof” as used herein refers to allpermutations and combinations of the listed items preceding the term.For example, “A, B, C, or combinations thereof” is intended to includeat least one of: A, B, C, AB, AC, BC, or ABC, and if order is importantin a particular context, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB.Continuing with this example, expressly included are combinations thatcontain repeats of one or more item or term, such as BB, AAA, MB, BBC,AAABCCCC, CBBAAA, CABABB, and so forth. The skilled artisan willunderstand that typically there is no limit on the number of items orterms in any combination, unless otherwise apparent from the context.

As used herein, the term “thermokinetic compounding” or “TKC” refers toa method of thermokinetic mixing until melt blended. TKC may also bedescribed as a thermokinetic mixing process or thermokinetic processingin which processing ends at a point sometime prior to agglomeration. Thecommercial name for this process is “KinetiSol®”.

As used herein, the phrase “a homogenous, heterogenous, orheterogeneously homogenous composite or an amorphous composite” refersto the various compositions that can be made using the TKC method.

As used herein, the term “heterogeneously homogenous composite” refersto a material composition having at least two different materials thatare evenly and uniformly distributed throughout the volume.

As used herein, the phrase “reference standard active pharmaceuticalingredient” means the most thermodynamically stable form of the activepharmaceutical ingredient that is currently available.

As used herein, the term “substantial degradation,” in conjunction withthe term “DFX” or “additional API(s)” refers to degradation leading tothe generation of impurities at levels beyond the threshold that hasbeen qualified by toxicology studies, or beyond the allowable thresholdfor unknown impurities. See, for example Guidance for Industry, Q3B(R2)Impurities in New Drug Products (International Committee forHarmonization, published by the U.S. Department of Health and HumanServices, Food and Drug Administration, Center for Drug Evaluation andResearch (CDER), Center for Biologics Evaluation and Research, July,2006. As used herein, the term “substantial degradation,” in conjunctionwith the term “excipient” refers to decomposition of the excipient tothe extent that the excipient would no longer meet the specificationsset forth in an official monograph of an accepted pharmacopeia, e.g.,the United States Pharmacopeia.

As used herein, the term “high melt viscosity” refers to meltviscosities greater than 10,000 Pa*s.

As used herein, the term “thermally labile API” refers to an API thatdegrades at its crystalline melting point, or one that degrades attemperatures below the crystalline melting point when in anon-crystalline (amorphous) form. As used herein, the term “thermolabilepolymer” refers to a polymer that degrades at or below about 200° C.

Whether the composition of the present disclosure is a homogenous,heterogenous, or heterogeneously homogenous composition, an amorphouscomposition or combinations thereof, the TKC processing conditions canproduce a composition with a glass transition temperature that is higherthan the glass transition temperature of an identical combination of thedrug and pharmaceutically acceptable excipients, adjuvants, additionalAPIs, or any combination thereof, thermally processed or processed usingthe MBP method, for example either with or without the use of aplasticizer. The TKC processing conditions can also produce acomposition with a single glass transition temperature, wherein anidentical combination of the identical API and pharmaceuticallyacceptable excipients, adjuvants, additional APIs, or any combinationthereof, processed thermally has two or more glass transitiontemperatures. In other embodiments, the pharmaceutical compositions ofthe present disclosure have a single glass transition temperature thatis at least about 20%, 30%, 40%, 50%, 60%, 70%, 80%, or 90% higher thanthe lowest glass transition temperature of the identical combinationprocessed thermally. Alternatively, the compositions made usingthermokinetic processing may generate compositions with a minimum of atleast about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.9%therapeutic potency with respect to each drug.

As used herein, the term “thermokinetic chamber” refers to an enclosedvessel or chamber in which the TKC method is used to make the novelcompositions of the present disclosure.

As used herein, “thermally processed” or “processed thermally” meansthat components are processed by hot melt extrusion, melt granulation,compression molding, tablet compression, capsule filling, film-coating,or injection molding.

As used herein, “extrusion” is the well-known method of applyingpressure to a damp or melted composition until it flows through anorifice or a defined opening. The extrudable length varies with thephysical characteristics of the material to be extruded, the method ofextrusion, and the process of manipulation of the particles afterextrusion. Various types of extrusion devices can be employed, such asscrew, sieve and basket, roll, and ram extruders. Furthermore, theextrusion can be carried out through melt extrusion. Components of thepresent disclosure can be melted and extruded with a continuous, solventfree extrusion process, with or without inclusion of additives. Suchprocesses are well-known to skilled practitioners in the art.

As used herein, “spray congealing” is a method that is generally used inchanging the structure of materials, to obtain free flowing powders fromliquids and to provide pellets. Spray congealing is a process in which asubstance of interest is allowed to melt, disperse, or dissolve in a hotmelt of other additives, and is then sprayed into an air chamber whereinthe temperature is below the melting point of the formulationcomponents, to provide congealed pellets. Such a process is well-knownto skilled practitioners in the art.

As used herein, “solvent dehydration” or “spray drying technique” iscommonly employed to produce a dry powder from a liquid or slurry byrapidly drying with a hot gas. This is one preferred method of dryingmany thermally-sensitive materials such as foods and pharmaceuticals.Water or organic solvent based formulations can be spray dried by usinginert process gas, such as nitrogen, argon and the like. Such a processis well-known to skilled practitioners in the art.

As used herein, “bioavailability” is a term meaning the degree to whicha drug becomes available to the target tissue after being administeredto the body. Poor bioavailability is a significant problem encounteredin the development of pharmaceutical compositions, particularly thosecontaining a drug that is not highly soluble.

As used herein, the phrase “pharmaceutically acceptable” refers tomolecular entities, compositions, materials, excipients, carriers, andthe like that do not produce an allergic or similar untoward reactionwhen administered to humans in general.

As used herein, “poorly soluble” refers to drug having a solubility suchthat the dose to be administered cannot be fully dissolved in 250 ml ofaqueous media ranging in pH from 1 to 7.5, a drug with a slowdissolution rate, and a drug with a low equilibrium solubility, forexample resulting in decreased bioavailability of the pharmacologicaleffect of the therapeutic drug being delivered.

As used herein, “derivative” refers to chemically modified inhibitors orstimulators that still retain the desired effect or property of theoriginal drug. Such derivatives may be derived by the addition, removal,or substitution of one or more chemical moieties on the parent molecule.Such moieties may include, but are not limited to, an element such as ahydrogen or a halide, or a molecular group such as a methyl group. Sucha derivative may be prepared by any method known to those of skill inthe art. The properties of such derivatives may be assayed for theirdesired properties by any means known to those of skill in the art. Asused herein, “analogs” include structural equivalents or mimetics.

The solution agent used in the solution can be aqueous such as water,one or more organic solvents, or a combination thereof. When used, theorganic solvents can be water miscible or non-water miscible. Suitableorganic solvents include but are not limited to ethanol, methanol,tetrahydrofuran, acetonitrile, acetone, tert-butyl alcohol, dimethylsulfoxide, N,N-dimethyl formamide, diethyl ether, methylene chloride,ethyl acetate, isopropyl acetate, butyl acetate, propyl acetate,toluene, hexanes, heptane, pentane, and combinations thereof.

By “immediate release” is meant a release of an API to an environmentover a period of seconds to no more than about 30 minutes once releasehas begun and release begins within no more than about 2 minutes afteradministration. An immediate release does not exhibit a significantdelay in the release of drug.

By “rapid release” is meant a release of an API to an environment over aperiod of 1-59 minutes or 0.1 minute to three hours once release hasbegun and release can begin within a few minutes after administration orafter expiration of a delay period (lag time) after administration.

As used herein, the term “extended release” profile assumes thedefinition as widely recognized in the art of pharmaceutical sciences.An extended release dosage form will release an API at a substantiallyconstant rate over an extended period of time or a substantiallyconstant amount of API will be released incrementally over an extendedperiod of time. An extended release tablet generally effects at least atwo-fold reduction in dosing frequency as compared to the API presentedin a conventional dosage form (e.g., a solution or rapid releasingconventional solid dosage forms).

By “controlled release” is meant a release of an API to an environmentover a period of about eight hours up to about 12 hours, 16 hours, 18hours, 20 hours, a day, or more than a day. By “sustained release” ismeant an extended release of an active agent to maintain a constant druglevel in the blood or target tissue of a subject to which the device isadministered.

The term “controlled release”, as regards to drug release, includes theterms “extended release,” “prolonged release,” “sustained release,” or“slow release,” as these terms are used in the pharmaceutical sciences.A controlled release can begin within a few minutes after administrationor after expiration of a delay period (lag time) after administration.

A “slow release dosage form” is one that provides a slow rate of releaseof API so that API is released slowly and approximately continuouslyover a period of 3 hours, 6 hours, 12 hours, 18 hours, a day, 2 or moredays, a week, or 2 or more weeks, for example.

The term “mixed release” as used herein refers to a pharmaceutical agentthat includes two or more release profiles for one or more activepharmaceutical ingredients. For example, the mixed release may includean immediate release and an extended release portion, each of which maybe the same API or each may be a different API.

A “timed release dosage form” is one that begins to release an API aftera predetermined period of time as measured from the moment of initialexposure to the environment of use.

A “targeted release dosage form” generally refers to an oral dosage formthat is designed to deliver an API to a particular portion of thegastrointestinal tract of a subject. An exemplary targeted dosage formis an enteric dosage form that delivers a drug into the middle to lowerintestinal tract but not into the stomach or mouth of the subject. Othertargeted dosage forms can deliver to other sections of thegastrointestinal tract such as the stomach, jejunum, ileum, duodenum,cecum, large intestine, small intestine, colon, or rectum.

By “delayed release” is meant that initial release of an API occursafter expiration of an approximate delay (or lag) period. For example,if release of an API from an extended release composition is delayed twohours, then release of the API begins at about two hours afteradministration of the composition, or dosage form, to a subject. Ingeneral, a delayed release is opposite of an immediate release, whereinrelease of an API begins after no more than a few minutes afteradministration. Accordingly, the API release profile from a particularcomposition can be a delayed-extended release or a delayed-rapidrelease. A “delayed-extended” release profile is one wherein extendedrelease of an API begins after expiration of an initial delay period. A“delayed-rapid” release profile is one wherein rapid release of an APIbegins after expiration of an initial delay period.

A “pulsatile release dosage form” is one that provides pulses of highAPI concentration, interspersed with low concentration troughs. Apulsatile profile containing two peaks may be described as “bimodal.” Apulsatile profile of more than two peaks may be described asmulti-modal.

A “pseudo-first order release profile” is one that approximates a firstorder release profile. A first order release profile characterizes therelease profile of a dosage form that releases a constant percentage ofan initial API charge per unit time.

A “pseudo-zero order release profile” is one that approximates azero-order release profile. A zero-order release profile characterizesthe release profile of a dosage form that releases a constant amount ofAPI per unit time.

II. THERMOKINETIC COMPOUNDING

In certain embodiments, the pharmaceutical formulations of the presentdisclosure are processed in a thermokinetic chamber as disclosed in U.S.Pat. No. 8,486,423, which is incorporated herein by reference. Thisdisclosure is directed to a method of blending certain heat sensitive orthermolabile components in a thermokinetic mixer by using multiplespeeds during a single, rotationally continuous operation on a batchcontaining thermolabile components in order to minimize any substantialthermal degradation, so that the resulting pharmaceutical compositionshave increased bioavailability and stability.

In a TKC chamber the average temperature inside the chamber is ramped upto a pre-defined final temperature over the duration of processing toachieve thermokinetic compounding of an API and the one or morepharmaceutically acceptable excipients, adjuvants, additional APIs, orcombinations thereof, into a composite. The length of processing andexposure to elevated temperatures during thermokinetic compounding willgenerally be below the thermal sensitivity threshold of the API, theexcipients, the adjuvants, the additional APIs, or all of these.Multiple speeds may be used during a single, rotationally continuous TKCoperation to achieve optimal thermokinetic mixing of the API and the oneor more pharmaceutically acceptable excipients, adjuvants and additionalAPIs, or combinations thereof, into a composite with minimal thermaldegradation. The pre-defined final temperature and speed(s) are selectedto reduce the possibility that the API, excipients, adjuvants,additional APIs and/or processing agents are degraded or theirfunctionality is impaired during processing. Generally, the pre-definedfinal temperature, pressure, time of processing and other environmentalconditions (e.g., pH, moisture, buffers, ionic strength, O₂) will beselected to substantially eliminate API, excipient, adjuvant, additionalAPIs and/or processing agent degradation.

Other embodiments include:

-   -   producing solid dispersions of DFX, with or without additional        APIs, by processing at low temperatures for very brief        durations;    -   producing solid dispersions of DFX, with or without additional        APIs, in thermolabile polymers and excipients by processing at        low temperatures for very brief durations;    -   rendering DFX, with or without additional APIs, amorphous while        dispersing in a polymeric, non-polymeric, or combination        excipient carrier system;    -   rendering DFX, with or without additional APIs, amorphous while        dispersing in a polymeric, non-polymeric, or combination        excipient carrier system and adjuvants;    -   producing composites comprising DFX, with or without additional        APIs, and one or more thermolabile polymers without the use of        processing agents; and

Additionally, compositions of the present disclosure may be processedusing any technique known to one skilled in the art to produce a solidformulation, including fusion or solvent based techniques. Specificexamples of these techniques include extrusion, melt extrusion, hot-meltextrusion, spray congealing, spray drying, hot-spin mixing, ultrasoniccompaction, and electrostatic spinning.

III. DEFERASIROX

A. Background

Deferasirox (DFX) is an orally active iron (as Fe³⁺) chelating agentindicated for the treatment of chronic iron overload. It is a tridentateligand that binds iron with high affinity in a 2:1 ratio. The molecularstructure of DFX is provided in below:

Its molecular formula is C₂₁H₁₅N₃O₄ with a corresponding molecularweight of 373.4 g/mol. The melting point of DFX is 264-265° C. and ithas a LogP value of 6.3 (Merck Index). It has pKa values of 4.57, 8.71,and 10.56 indicating compound is weakly acidic^([1]). DFX exhibits pHdependent solubility: it is insoluble in acidic media and isincreasingly more soluble with increasing pH^([1]). The reported watersolubility of DFX is 0.4 mg/ml at 25° C.^([1]).

As stated above, the pharmacokinetics of orally administered DFX can becharacterized as highly variable with the most probable source ofvariability being its pH-dependent solubility. Weakly acidic compoundswith low solubility in gastric fluid have a tendency to form insolubleaggregated structures when exposed to acidic media for extendeddurations absent the proper delivery system^([2]). When these insolublestructures are formed in the stomach, dissolution and absorption of thecompound from the intestinal lumen is substantially reduced despiterelatively good solubility of the free compound in intestinal fluids. Asgastrointestinal pH can vary widely for a given individual fromday-to-day and between individuals based on nutritional and diseasedstates and/or the influence of medications, it is understood that thesolubility properties of DFX can lead to erratic oral absorption, andconsequently, diminished therapeutic outcomes.

The absolute bioavailability of DFX tablets for oral suspension(Exjade®) has been reported to be 70% compared to an intravenous dose(see Exjade® package insert). However, it has also been reported that asignificant proportion of transfusional iron overload patients are poorresponders to DFX, which was directly correlated to low systemicexposure in a recent clinical study^([3]). Further, substantial positivefood effect has been reported for DFX, with iron overload patientsexhibiting two-fold higher exposure when DFX is administered with a highfat meal. At steady state (7-day dosing), 84% of the total DFX dose wasrecovered in the feces as unchanged drug, which was partly attributableto incomplete intestinal absorption^([4]). These clinical findingssuggest that an improved oral delivery system for DFX could improvetherapeutic outcomes by: (1) reducing intra and inter-patientvariability, (2) improving absorption/enabling therapy fornon-responders, and (3) eliminating food effects. Finally, reducing thetherapeutic dose via bioavailability enhancement and mitigatingvariability could also lead to a reduction in the frequency of adverseevents associated with DFX toxicity.

B. Iron Toxicity

Iron overload, also known as hemochromatosis, indicates accumulation ofiron in the body from any cause. The most important causes arehereditary hemochromatosis (HHC), a genetic disorder, and transfusionaliron overload, which can result from repeated blood transfusion.

1. Signs and Symptoms

Organs commonly affected by hemochromatosis are the liver, heart, andendocrine glands. Haemochromatosis may present with the followingclinical syndromes:

-   -   Cirrhosis of the liver (varies from zonal iron deposition to        fibrosis)    -   Diabetes due to selective iron deposition in pancreatic islet        beta cells leading to functional failure and cell death    -   Cardiomyopathy    -   Arthritis (calcium pyrophosphate deposition in joints)    -   Testicular failure    -   Slate grey discoloration of the skin    -   Joint pain and bone pain

2. Development

The causes can be distinguished between primary cases (hereditary orgenetically determined) and less frequent secondary cases (acquiredduring life). People of Celtic (Irish, Scottish, Welsh, Cornish, Breton,etc.), British, and Scandinavian origin have a particularly highincidence of whom about 10% are carriers of the C282Y mutation on theHFE gene associated with HLA-A3 and 1% suffer from the condition.

Primary hemochromatosis. Although it was known for most of the 20thcentury that most cases of hemochromatosis were inherited, they wereincorrectly assumed to depend on a single gene. The overwhelmingmajority actually depend on mutations of the HFE gene discovered in1996, but since then others have been discovered and sometimes aregrouped together as “non-classical hereditary hemochromatosis,” “non-HFErelated hereditary hemochromatosis” or “non-HFE hemochromatosis.” Mosttypes of hereditary hemochromatosis have autosomal recessiveinheritance, while type 4 has autosomal dominant inheritance.

Secondary hemochromatosis. Severe chronic hemolysis of any cause,including intravascular hemolysis and ineffective erythropoiesis(hemolysis within the bone marrow) Multiple frequent blood transfusions(either whole blood or just red blood cells), which are usually neededeither by individuals with hereditary anemias (such as β-thalassaemiamajor, sickle cell anemia, and Diamond-Blackfan anemia) or by olderpatients with severe acquired anemias such as in myelodysplasticsyndromes. Excess parenteral iron supplements, such as what can acutelyhappen in iron poisoning.

Some disorders do not normally cause hemochromatosis on their own, butmay do so in the presence of other predisposing factors. These includecirrhosis (especially related to alcohol abuse), steatohepatitis of anycause, porphyria cutanea tarda, prolonged hemodialysis, andpost-portacaval shunting

3. Detection

There are several methods available for diagnosing and monitoring ironloading including serum ferritin, liver biopsy, HFE and MRI. Serumferritin testing is a low-cost, readily available, and minimallyinvasive method for assessing body iron stores. However, the majorproblem with using it as an indicator of iron overload is that it can beelevated in a range of other medical conditions unrelated to iron levelsincluding infection, inflammation, fever, liver disease, renal disease,and cancer. Also, total iron binding capacity may be low, but can alsobe normal.

Positive HFE analysis confirms the clinical diagnosis of hemochromatosisin asymptomatic individuals with blood tests showing increased ironstores, or for predictive testing of individuals with a family historyof hemochromatosis. The alleles evaluated by HFE gene analysis areevident in ˜80% of patients with hemochromatosis; a negative report forHFE gene does not rule out hemochromatosis. In a patient with negativeHFE gene testing, elevated iron status for no other obvious reason, andfamily history of liver disease, additional evaluation of liver ironconcentration is indicated. In this case, diagnosis of hemochromatosisis based on biochemical analysis and histologic examination of a liverbiopsy. Assessment of the hepatic iron index (HII) is considered the“gold standard” for diagnosis of hemochromatosis. Magnetic resonanceimaging (MRI) is emerging as a noninvasive alternative to accuratelyestimate iron deposition levels in the liver as well as heart, joints,and pituitary gland.

Family members of those with primary hemochromatosis should be screenedto determine if they are a carrier or if they could develop the disease.This can allow preventive measures to be taken. Screening the generalpopulation is not recommended.

4. Treatment

Routine treatment in an otherwise-healthy person consists of regularlyscheduled phlebotomies (bloodletting). When first diagnosed, thephlebotomies may be fairly frequent, perhaps as often as once a week,until iron levels can be brought to within normal range. Once iron andother markers are within the normal range, phlebotomies may be scheduledevery other month or every three months depending upon the patient'srate of iron loading. Each session typically draws from 450 to 500 cc.

For those unable to tolerate routine blood draws, there is a chelatingagent available for use. The drug deferoxamine binds with iron in thebloodstream and enhances its elimination via urine and feces. Typicaltreatment for chronic iron overload requires subcutaneous injection overa period of 8-12 hours daily. Two newer iron chelating drugs that arelicensed for use in patients receiving regular blood transfusions totreat thalassaemia (and, thus, who develop iron overload as a result)are deferasirox and deferiprone.

5. Prognosis

A third of those untreated develop hepatocellular carcinoma. Affectedindividuals over age 40 or who have high serum ferritin levels are atrisk for developing cirrhosis. Significant problems occur in around onein ten.

C. Delivery

A variety of administration routes are available for delivering DFX to apatient in need. The particular route selected will depend upon theparticular drug selected, the weight and age of the patient, and thedosage required for therapeutic effect. The pharmaceutical compositionsmay conveniently be presented in unit dosage form. DFX suitable for usein accordance with the present disclosure, and its pharmaceuticallyacceptable salts, derivatives, analogs, prodrugs, and solvates thereof,can be administered alone, but will generally be administered inadmixture with a suitable pharmaceutical excipient, adjuvant, diluent,or carrier selected with regard to the intended route of administrationand standard pharmaceutical practice, and can in certain instances beadministered with one or more additional API(s), preferably in the sameunit dosage form.

DFX may be used in a variety of application modalities, including oraldelivery as tablets, capsules or suspensions; pulmonary and nasaldelivery; topical delivery as emulsions, ointments or creams;transdermal delivery; and parenteral delivery as suspensions,microemulsions or depot. As used herein, the term “parenteral” includessubcutaneous, intravenous, intramuscular, or infusion routes ofadministration.

D. Excipients

The excipients and adjuvants that may be used in the presently disclosedcompositions and composites, while potentially having some activity intheir own right, for example, antioxidants, are generally defined forthis application as compounds that enhance the efficiency and/orefficacy of DFX. It is also possible to have more than one API in agiven solution, so that the particles formed contain more than one API.

Any pharmaceutically acceptable excipient known to those of skill in theart may be used to produce the composites and compositions disclosedherein. Examples of excipients for use with the present disclosureinclude, but are not limited to, e.g., a pharmaceutically acceptablepolymer, a thermolabile polymeric excipient, or a non-polymericexicipient. Other non-limiting examples of excipients include, lactose,glucose, starch, calcium carbonate, kaoline, crystalline cellulose,silicic acid, water, simple syrup, glucose solution, starch solution,gelatin solution, carboxymethyl cellulose, shellac, methyl cellulose,polyvinyl pyrrolidone, dried starch, sodium alginate, powdered agar,calcium carmelose, a mixture of starch and lactose, sucrose, butter,hydrogenated oil, a mixture of a quaternary ammonium base and sodiumlauryl sulfate, glycerine and starch, lactose, bentonite, colloidalsilicic acid, talc, stearates, and polyethylene glycol, sorbitan esters,polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkylethers, poloxamers (polyethylene-polypropylene glycol block copolymers),sucrose esters, sodium lauryl sulfate, oleic acid, lauric acid, vitaminE TPGS, polyoxyethylated glycolysed glycerides, dipalmitoyl phosphaditylcholine, glycolic acid and salts, deoxycholic acid and salts, sodiumfusidate, cyclodextrins, polyethylene glycols, polyglycolyzedglycerides, polyvinyl alcohols, polyacrylates, polymethacrylates,polyvinylpyrrolidones, phosphatidyl choline derivatives, cellulosederivatives, biocompatible polymers selected from poly(lactides),poly(glycolides), poly(lactide-co-glycolides), poly(lactic acid)s,poly(glycolic acid)s, poly(lactic acid-co-glycolic acid)s and blends,combinations, and copolymers thereof.

As stated, excipients and adjuvants may be used to enhance the efficacyand efficiency of the API. Additional non-limiting examples of compoundsthat can be included are binders, carriers, cryoprotectants,lyoprotectants, surfactants, fillers, stabilizers, polymers, proteaseinhibitors, antioxidants, bioavailability enhancers and absorptionenhancers. The excipients may be chosen to modify the intended functionof the active ingredient by improving flow, or bio-availability, or tocontrol or delay the release of the API. Specific nonlimiting examplesinclude: sucrose, trehaolose, Span 80, Span 20, Tween 80, Brij 35, Brij98, Pluronic, sucroester 7, sucroester 11, sucroester 15, sodium laurylsulfate (SLS, sodium dodecyl sulfate. SDS), dioctyl sodiumsulphosuccinate (DSS, DOSS, dioctyl docusate sodium), oleic acid,laureth-9, laureth-8, lauric acid, vitamin E TPGS, Cremophor® EL,Cremophor® RH, Gelucire® 50/13, Gelucire® 53/10, Gelucire® 44/14,Labrafil®, Solutol® HS, dipalmitoyl phosphadityl choline, glycolic acidand salts, deoxycholic acid and salts, sodium fusidate, cyclodextrins,polyethylene glycols, Labrasol®, polyvinyl alcohols, polyvinylpyrrolidones and tyloxapol. Using the process of the present disclosure,the morphology of the active ingredients can be modified, resulting inhighly porous microparticles and nanoparticles.

Exemplary polymer carriers or thermal binders that may be used in thepresently disclosed compositions and composites include but are notlimited to polyethylene oxide; polypropylene oxide;polyvinylpyrrolidone; polyvinylpyrrolidone-co-vinylacetate; acrylate andmethacrylate copolymers; polyethylene; polycaprolactone;polyethylene-co-polypropylene; alkylcelluloses such as methylcellulose;hydroxyalkylcelluloses such as hydroxymethylcellulose,hydroxyethylcellulose, hydroxypropylcellulose, andhydroxybutylcellulose; hydroxyalkyl alkylcelluloses such as hydroxyethylmethylcellulose and hydroxypropyl methylcellulose; starches, pectins;polysaccharides such as tragacanth, gum arabic, guar gum, and xanthangum. One embodiment of the binder is poly(ethylene oxide) (PEO), whichcan be purchased commercially from companies such as the Dow ChemicalCompany, which markets PEO under the POLY OX® exemplary grades of whichcan include WSR N80 having an average molecular weight of about 200,000;1,000,000; and 2,000,000.

Suitable polymer carriers or thermal binders that may or may not requirea plasticizer include, for example, Eudragit® RS PO, Eudragit® S100,Kollidon® SR (poly(vinyl acetate)-co-poly(vinylpyrrolidone) copolymer),Ethocel® (ethylcellulose), HPC (hydroxypropylcellulose), celluloseacetate butyrate, poly(vinylpyrrolidone) (PVP), poly(ethylene glycol)(PEG), poly(ethylene oxide) (PEO), poly(vinyl alcohol) (PVA),hydroxypropyl methylcellulose (HPMC), ethylcellulose (EC),hydroxyethylcellulose (HEC), sodium carboxymethyl-cellulose (CMC),dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer (GA-MMA), C-5 or 60 SH-50(Shin-Etsu Chemical Corp.), cellulose acetate phthalate (CAP), celluloseacetate trimelletate (CAT), poly(vinyl acetate) phthalate (PVAP),hydroxypropylmethylcellulose phthalate (HPMCP), poly(methacrylateethylacrylate) (1:1) copolymer (MA-EA), poly(methacrylatemethylmethacrylate) (1:1) copolymer (MA-MMA), poly(methacrylatemethylmethacrylate) (1:2) copolymer, Eudragit® L-30-D (MA-EA, 1:1),Eudragit® L100-55 (MA-EA, 1:1), Eudragit® EPO (poly(butylmethacylate-co-(2-dimethylaminoethyl) methacrylate-co-methylmethacrylate) 1:2:1), hydroxypropylmethylcellulose acetate succinate(HPMCAS), Coateric® (PVAP), Aquateric® (CAP), and AQUACOAT® (HPMCAS),Soluplus® (polyvinyl caprolactam-polyvinyl acetate-polyethylene glycolgraft copolymer, BASF), Luvitec® K 30 (polyvinylpyrrolidone, PVP),Kollidon® (polyvinylpyrrolidone, PVP), polycaprolactone, starches,pectins; polysaccharides such as tragacanth, gum arabic, guar gum, andxanthan gum.

The carrier may also contain various functional excipients, such as:hydrophilic polymer, antioxidant, super-disintegrant, surfactantincluding amphiphilic molecules, wetting agent, stabilizing agent,retardant, similar functional excipient, or combination thereof, andplasticizers including citrate esters, polyethylene glycols, PG,triacetin, diethylphthalate, castor oil, and others known to those orordinary skill in the art. Extruded material may also include anacidifying agent, adsorbent, alkalizing agent, buffering agent,colorant, flavorant, sweetening agent, diluent, opaquant, complexingagent, fragrance, preservative or a combination thereof.

Exemplary hydrophilic polymers which can be a primary or secondarypolymeric carrier that can be included in the composites or compositiondisclosed herein include poly(vinyl alcohol) (PVA),polyethylene-polypropylene glycol (e.g., POLOXAMER®), carbomer,polycarbophil, or chitosan. Hydrophilic polymers for use with thepresent disclosure may also include one or more of hydroxypropylmethylcellulose, carboxymethylcellulose, hydroxypropyl cellulose,hydroxyethyl cellulose, methylcellulose, natural gums such as gum guar,gum acacia, gum tragacanth, or gum xanthan, and povidone. Hydrophilicpolymers also include polyethylene oxide, sodium carboxymethycellulose,hydroxyethyl methyl cellulose, hydroxymethyl cellulose,carboxypolymethylene, polyethylene glycol, alginic acid, gelatin,polyvinyl alcohol, polyvinylpyrrolidones, polyacrylamides,polymethacrylamides, polyphosphazines, polyoxazolidines,poly(hydroxyalkylcarboxylic acids), carrageenate alginates, carbomer,ammonium alginate, sodium alginate, or mixtures thereof.

Compositions with enhanced solubility may comprise a mixture of DFX andan additive that enhances the solubility of the DFX. Examples of suchadditives include but are not limited to surfactants, polymer carriers,pharmaceutical carriers, thermal binders or other excipients. Aparticular example may be a mixture of DFX with a surfactant orsurfactants, DFX with a polymer or polymers, or DFX with a combinationof a surfactant and polymer carrier or surfactants and polymer carriers.A further example is a composition where the DFX is a derivative oranalog thereof.

Surfactants that can be used in the disclosed compositions to enhancesolubility have been previously presented. Particular examples of suchsurfactants include but are not limited to sodium dodecyl sulfate,dioctyl docusate sodium, Tween 80, Span 20, Cremophor® EL or Vitamin ETPGS. Polymer carriers that can be used in the disclosed composition toenhance solubility have been previously presented. Particular examplesof such polymer carriers include but are not limited to Soluplus®,Eudragit® L100-55, Eudragit® EPO, Kollidon® VA 64, Luvitec®. K 30,Kollidon®, AQOAT®-HF, and AQOAT®-LF. The composition of the presentdisclosure can thus be any combination of one or more of the APIs, zero,one or more of surfactants or zero, one or more of polymers presentedherein.

Solubility can be indicated by peak solubility, which is the highestconcentration reached of a species of interest over time during asolubility experiment conducted in a specified medium. The enhancedsolubility can be represented as the ratio of peak solubility of theagent in a pharmaceutical composition of the present disclosure comparedto peak solubility of the reference standard agent under the sameconditions. Preferable, an aqueous buffer with a pH in the range of fromabout pH 4 to pH 8, about pH 5 to pH 8, about pH 6 to pH 7, about pH 6to pH 8, or about pH 7 to pH 8, such as, for example, pH 4.0, 4.5, 5.0,5.5, 6.0, 6.2, 6.4, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.4, 7.6, 7.8, or8.0, may be used for determining peak solubility. This peak solubilityratio can be about 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 12:1,15:1, 20:1, 25:1, 30:1, 35:1, 40:1, 45:1, 50:1, 55:1 or higher.

Bioavailability can be indicated by the AUC of DFX as determined duringin vivo testing, where AUC is the area under the blood concentrationversus time curve for DFX. Enhanced bioavailability can be representedas the ratio of AUC of the DFX in a pharmaceutical composition of thepresent disclosure compared to AUC of the reference standard DFX underthe same conditions. This AUC ratio reflecting enhanced bioavailabilitycan be about 4:3, 5:3, 2:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 12:1, 15:1,20:1, 25:1, 30:1, 35:1, 40:1, 45:1, 50:1, 55:1, 60:1, 65:1, 70:1, 75:1,80:1, 85:1, 90:1, 95:1, 98:1, 99:1, 100:1 or higher.

E. Other API's

In one embodiment, a second active pharmaceutical ingredient may becombined with DFX produced in accordance with the disclosed methods.Those of skill in the art are familiar with suitable tabletarchitectures (side-by-side tablets, layered tablets, coated tablets,etc.) to achieve a coformulation. The second active pharmaceuticalingredient may be a second iron chelator, an agent used in the treatmentor prevention of osteoporosis, an anti-fungal agent, or an agent thatincreases the rate of production of red blood cells, such asamphotericin B, deferiprone, deferoxamine, erythropoietin, orrisedronate.

IV. EXAMPLES

It will be understood that particular embodiments described herein areshown by way of illustration and not as limitations of the disclosure.The principal features of this disclosure can be employed in variousembodiments without departing from the scope of the disclosure. All ofthe compositions and/or methods disclosed and claimed herein can be madeand executed without undue experimentation in light of the presentdisclosure. While the compositions and methods of this disclosure havebeen described in terms of preferred embodiments, it will be apparent tothose of skill in the art that variations may be applied to thecompositions and/or methods and in the steps or in the sequence of stepsof the method described herein without departing from the concept,spirit and scope of the disclosure. All such similar substitutes andmodifications apparent to those skilled in the art are deemed to bewithin the spirit, scope and concept of the disclosure as defined by theappended claims.

Example 1—KinetiSol® Processing of Various Deferasirox Compositions

KinetiSol® processing was performed with a cGMP TC-254B compounderdesigned by DisperSol Technologies. Prior to compounding, DFX andexcipients were accurately weighed and dispensed into a PE bag andhand-blended for 5 minutes. Blends were then manually charged into theKinetiSol® chamber for each trial. During processing, temperature,rotational speed, and motor amperage were continuously monitored up tothe instantaneous discharge of the product upon achieving the set pointtemperature. Immediately following product ejection from the KinetiSol®compounder, the molten product mass was rapidly transferred to apneumatic press where it was quenched at high pressure inside a 15 cmround stainless steel mold.

After quenching, each KinetiSol® product batch was milled using a L1AFitzMill® Comminutor (The Fitzpatrick Company, Elmhurst, Ill.) in hammerconfiguration fitted with a 0.020″ screen at 6500-8000 RPM. The milledproducts were screened through a 60-mesh sieve (250 μm).

TABLE 1 Summary of amorphous DFX copositions produced by KinetiSol ®Processing conditions Rotation speed Lot [rpm], Ejection numberComposition temperature [° C.] 13-004-37 40% API, 60% Copovidone 2400,170 13-004-38 40% API, 60% Copovidone 2400, 140 13-004-58 50% API, 50%Copovidone 2400, 170 13-004-79 50% API, 50% Copovidone 2400, 17013-004-40 60% API, 40% Copovidone 2400, 170 13-004-41 20% API, 80%HPMCAS L 2400, 170 13-004-50 40% API, 60% Eudragit L100-55 3000 & 3400,170 13-004-57 40% API, 30% Copovidone, 30% Eudragit 2900, 170 L100-5513-004-60 50% API, 25% Copovidone, 25% Eudragit 2900, 170 L100-5513-004-47 50% API, 33.3% Copovidone, 16.7% 2400, 170 HPMCAS L

FIG. 1 is a representative processing profile for an amorphousintermediate containing DFX and Eudragit L100-55. The profiledemonstrates that the time for which the drug and polymer were exposedto elevated temperatures was limited to about 10 seconds and the maximumprocessing temperature was 170° C.; approximately 95° C. below themelting point of DFX. Producing an entirely amorphous DFX compositionwith high drug loading by thermal processing at temperatures well belowthe melting point and for very brief durations is a surprising resultthat is uniquely enabled by the KinetiSol® process. Furthermore,limiting the duration and extent of thermal exposure is critical toachieving product of this composition with acceptable drug and polymerpurity.

FIG. 2 shows a representative processing profile for an amorphousintermediate containing DFX and copovidone. The profile demonstratesthat the time for which the drug and polymer were exposed to elevatedtemperatures was limited to about 3 seconds and the maximum processingtemperature was 170° C.; approximately 95° C. below the melting point ofDFX. As previously discussed, achieving an entirely amorphous DFXcomposition with high drug loading at the conditions of lot 79 is asurprising result unique to the KinetiSol® process. As stated above,limiting the duration and extent of thermal exposure is critical toachieving product of this composition with acceptable drug and polymerpurity.

Example 2—Solid-State Analysis of KinetiSol® Processed DeferasiroxCompositions by X-Ray Diffraction and Modulated Differential ScanningCalorimetry

XRD Method and Results. An Equinox 100 standalone bench top X-raydiffractometer (INEL, Inc., Stratham N.H.) was used to analyze the soliddispersions for presence of DFX crystallinity immediately aftermanufacture and on storage at accelerated conditions. Samples wereplaced in an aluminum crucible and loaded in a rotating sample holder.Samples were analyzed for 600 seconds using a Cu K radiation source(λ=1.5418 Å) operating at 42 kV and 0.81 mA.

Results provided in FIGS. 3-12 illustrate that substantially amorphousDFX solid dispersions of varying compositions were manufactured byKinetiSol®. Also contained in these figures are results demonstratingthat these compositions remain amorphous on extended storage ataccelerated conditions: 40° C./75% RH, open container. Consequently,this analysis confirmed that the KinetiSol® process is capable ofgenerating amorphous solid dispersions of DFX at high drug loadingsdespite the high melting temperature of the compound that precludes theuse of other thermal processing technologies.

mDSC method and results. Modulated Differential Scanning Calorimetry(mDSC) analyses were performed using a TA Instruments Model Q20modulated differential scanning calorimeter (New Castle, Del.) operatingunder a high purity nitrogen flow rate of 50 ml/min. Sample aliquotswere weighed into Tzero aluminum sample pans within a sample weightrange of 10-15 mg. The pans were then capped with a Tzero lid andcrimped using the Tzero sample press. The samples were analyzed by amodulated method in a temperature range from 25-310° C. at a ramp rateof 5° C./min, an amplitude of 1° C., and a period of 60 sec.

TABLE 2 Selected results of mDSC analysis for several amorphous DFXdispersions produced by KinetiSol ® Glass transition temperature Lotnumber Composition [° C.] 13-004-37 40% API, 60% Copovidone 120.713-004-38 40% API, 60% Copovidone 119.5 13-004-40 60% API, 40%Copovidone 115.9 13-004-50 40% API, 60% Eudragit L100-55 83.7 13-004-4750% API, 33.3% Copovidone, 16.7% 110.6 HPMCAS L

The results presented in Table 2 illustrate that single-phase amorphousdispersions of DFX in various polymer systems were achieved byKinetiSol® as demonstrated by their single glass transition temperatures(T_(g)). Further, the T_(g)s for all systems are substantially greaterthan the anticipated maximum storage temperatures (˜40° C.), suggestingthat all systems will be physically stable for pharmaceutically relevantstorage times (≤2 years). These T_(g)s are also substantially higherthan what could be achieved for these systems when processing with otherthermal technologies, if these technologies could be enabled by theintroduction of plasticizers. With the addition of a plasticizer, theT_(g)s of the compositions would be substantially reduced, andcorrespondingly, the product shelf life.

Example 3—HPLC Analysis of KinetiSol® Processed Deferasirox Compositions

Deferasirox samples were analyzed for potency and impurities by reversedphase HPLC analysis. The standard and sample diluent was a 50/50 mixtureof acetonitrile and methanol. Standards and samples were prepared at aconcentration of 0.05 mg of deferasirox API per mL of solution. Briefsonication was performed, when necessary, to add with dissolving thesamples. All samples were filtered through a 0.45 μm nylon syringefilter prior to analysis.

A 50 mM ammonium phosphate monobasic buffer with pH adjusted to 8.00 wasused as mobile phase A and 100% acetonitrile was used as mobile phase B.The method utilized a gradient (below) to modulate mobile phasecomposition with a constant flow rate of 0.25 mL per minute. The totalgradient run time was 14 minutes. Standard and assay sample injectionvolume was 2 μL and the impurities injection volume was 10 μL. Sampleswere maintained at ambient temperature. The column used was a Luna 2.5um C18(2) HST column from Phenomenex, part number 00D-4446-B0, and wasmaintained at 40° C. during analysis. The detection wavelength fordeferasirox was 247 nm with a typical deferasirox retention time of 3.3minutes. Gradient method parameters are shown below:

Time Mobile Phase A Mobile Phase B (minutes) (%) (%) 0 70 30 2 70 30 920 80 10 20 80 11 70 30 14 70 30

The results of HPLC analysis shown in Table 3 reveal that all lots hadpurity values in excess of 99.5%, and most exceeded 99.9% purity. Thesedata demonstrate that substantially amorphous dispersions of DFX invarious polymer systems were able to be produced by KinetiSol® withnegligible generation of process related impurities. This result isuniquely enabled by KinetiSol® owing to the short processing times andlow temperatures at which a high drug load amorphous dispersion wasachieved for the high-melting DFX.

TABLE 3 Summary of potency and purity analysis by HPLC for variousKinetiSol ® processed DFX amorphous solid dispersions Potency [% labelPurity Lot Composition claim] [% area] 13-004-37 40% API, 60% Copovidone92.3 99.94 13-004-38 40% API, 60% Copovidone 95.8 99.96 13-004-40 60%API, 40% Copovidone 95.2 99.97 13-004-47 50% API, 33.33% Copovidone,16.67% 94.8 99.95 HPMCAS L 13-004-50 40% API, 60% Eudragit L100-55 100.099.53 13-004-57 40% API, 30% Copovidone, 30% 100.5 99.93 EudragitL100-55

Example 4—Tableting or Encapsulation of KinetiSol® Processed AmorphousIntermediates of Deferasirox

In order to assess the performance of various DFX amorphous soliddispersions relative to the commercial Exjade® and Jadenu® products, theamorphous intermediates was further processed into final dosage forms,i.e., tablets and capsules. The methods by which these tablets andcapsules were produced and their quantitative compositions are providedbelow.

Tableting procedure. Milled DFX amorphous solid dispersions were blendedin glass bottles with all non-lubricant excipients for 10 minutes in aMaxiBlend Lab Blender (GlobePharma, North Brunswick, N.J.) fitted with abottle blending attachment. Lubricant was then added and the mixtureblended for an additional 5 minutes. Individual portions of the blendwere weighed and compressed into 9.28 mm×19 mm modified capsule shapedtablets, (unless stated otherwise) at 3,000-4,000 psig compression forceusing a Manual Tablet Compaction Machine (MTCM-1, Globe Pharma, Inc.,New Brunswick, N.J.).

TABLE 4 Tablet composition of Lot 13.004.73 - for dissolution analysis.Component % w/w mg/tablet Lot 13-004-58 90.0 720.0 Microcrystalline 5.040.0 cellulose Croscarmellose 3.0 24.0 Sodium chloride 1.5 12.0Magnesium stearate 0.5 4.0 Total 100.0 800.0

TABLE 5 Tablet composition of Lot 13.004.74 - for dissolution analysisComponent % w/w mg/tablet Lot 13-004-58 99.5 716.4 Magnesium stearate0.5 3.6 Total 100.0 720.0

TABLE 6 Tablet composition of Lot 13.004.75 - for dissolution analysisComponent % w/w mg/tablet Lot 13-004-60 90.0 720.0 Microcrystalline 5.040.0 cellulose Croscarmellose 3.0 24.0 Sodium chloride 1.5 12.0Magnesium stearate 0.5 4.0 Total 100.0 800.0

TABLE 7 Tablet composition of Lot 13.004.76 - for dissolution analysisComponent % w/w mg/tablet Lot 13-004-60 99.5 716.4 Magnesium stearate0.5 3.6 Total 100.0 720.0

TABLE 8 Tablet composition of Lot 13.004.77 - for dissolution analysisComponent % w/w mg/tablet Lot 13-004-50 90.0 900.0 Microcrystalline 5.050.0 cellulose Croscarmellose 3.0 30.0 Sodium chloride 1.5 15.0Magnesium stearate 0.5 5.0 Total 100.0 1000.0

TABLE 9 Tablet composition of Lot 13.004.78 - for dissolution analysisComponent % w/w mg/tablet Lot 13-004-50 99.5 895.5 Magnesium stearate0.5 4.5 Total 100.0 900.0

TABLE 10 Lots 13.004.84.1-4: Tablets of different geometries fordissolution testing Component #1 #2 #3 #4 Lot 13-004-40 [mg] 600.0 600.0600.0 200 Mannitol [mg] — —  66.7 — Tablet tooling Modified Round flatModified Round capsule 15 mm capsule concave 9.28 mm × diameter 9.28 mm× 7.5 mm 19 mm 19 mm diameter

Encapsulation procedure. Capsules containing DFX milled amorphousintermediate were prepared by manually filling a pre-weighed aliquot ofthe amorphous intermediate, equivalent to 180 mg of DFX, into size 0hard gelatin capsules. Two capsules, equivalent to 360 mg of DFX, wereused for in vitro dissolution testing.

Example 5—In Vitro Dissolution Analysis of Tablet and CapsulesContaining KinetiSol® Processed Amorphous Intermediates of Deferasirox

The dissolution properties of various Deferasirox samples wereinvestigated using a USP Apparatus 2 dissolution tester with reversedphase HPLC method for quantification. 0.1N HCl (pH 1.1) and 0.2M sodiumphosphate tribasic solutions were prepared for dissolution media. Bothwere degassed and preheated prior to use. Additionally, a diluentcomposed of 50/50 acetonitrile/water was prepared for dissolution sampledilution. A standard was prepared at a nominal concentration of 0.05 mgdeferasirox API per mL of solution using an appropriate combination ofdissolution media and diluent to dissolve. 750 mL of 0.1N HCl was addedto each vessel of analysis and allowed to equilibrate to 37° C. Anequivalent of 360 mg of deferasirox API was added to each vessel andpaddle revolution was initiated at 50 rpm. At 1 and 2 hours, 5 mLaliquots were pulled from each vessel of analysis and filtered through0.45 μm nylon syringe filters. Immediately after the 2 hour pull, 250 mLof pre-heated 0.2M sodium phosphate tribasic solution was rapidly addedto each vessel of analysis to yield a pH of 6.8. At 2.25, 2.5, 3, 4, 6,and 8 hour total run time, 5 mL aliquots were pulled from each vessel ofanalysis and filtered through 0.45 μm nylon syringe filters. Allfiltered samples were rapidly diluted with diluent using a dilutionfactor of 10 and then transferred to HPLC vials for analysis.

A 50 mM ammonium phosphate monobasic buffer with pH adjusted to 8.00 wasused as mobile phase A and 100% acetonitrile was used as mobile phase B.The method utilized an isocratic ratio of 60/40 mobile phase A/mobilephase B with a constant flow rate of 0.25 mL per minute. The totalgradient run time was 4 minutes. Standard and sample injection volumewas 2 μL and the samples were maintained at ambient temperature. Thecolumn used was a Luna 2.5 um C18(2) HST column from Phenomenex, partnumber 00D-4446-B0, and was maintained at 40° C. during analysis. Thedetection wavelength for deferasirox was 247 nm with a typicaldeferasirox retention time of 2.0 minutes.

FIG. 13 shows dissolution results comparing pure DFX API, Jadenu®,Exjade® and several amorphous DFX solid dispersions filled intocapsules. All formulations tested exhibit minimal release during thefirst 2 hours of the test (the acid phase) due to the highly insolublenature of DFX in acidic media. Following the media change to pH 6.8buffer, all of the crystalline DFX articles (pure API, Jadenu®, andExjade®) show relative fast, yet limited release, with no compositionreleasing more than about 25% of its theoretical drug content. Thisresult is surprising because based on the reported water solubility forDFX, 400 mg of the drug should be soluble in the neutral phase of thisdissolution test; therefore, it is unclear why the crystallineformulations would begin to reach an asymptote for drug release near20%. All KinetiSol® processed formulations exhibited rapid and extensivedissolution relative to the crystalline controls, including lot 39 whichwas partially crystalline. All substantially amorphous formulationsconverged to a limit of about 80% release of the theoretical drugcontent; approximately four-fold greater than the crystalline DFXcontrol samples. With the exception of lot 50, all substantiallyamorphous DFX formulations reached their maximum drug concentrations bythe first time point, illustrating extremely rapid dissolution withformulations containing copovidone. Lot 50, containing only EudragitL100-55 and DFX, exhibited a somewhat slower release rate relative tothe other amorphous compositions, but reached near the same plateauconcentration.

The dissolution results provided in FIG. 14 demonstrate the differentrelease profiles that can be achieved by formulating the various DFXamorphous intermediates as disintegrating or eroding tablets. Therapidly disintegrating tablets show very similar DFX release to theamorphous intermediates, while eroding tablets can be produced withsubstantially reduced release rates. If this release modulation in vitrotranslates to tunable pharmacokinetic profiles in vivo, it wouldrepresent a significant advantage for the compositions of the currentdisclosure as it could potentially enable achievement of the mosttherapeutically beneficial PK profile.

The results shown in FIG. 15 demonstrate the effect of tablet geometryon the release rate of an eroding tablet containing a DFX:Copovidone(60:40 w/w) amorphous dispersion. These results suggest that alteringtablet surface area provides another mode by which the release rate ofan eroding amorphous DFX tablet can be adjusted.

Example 6—Pharmacokinetic Evaluation in Dogs of Tablet and CapsulesContaining KinetiSol® Processed Amorphous Intermediates of Deferasirox

Pharmacokinetic analysis following oral administration of threeprototype DFX formulations containing novel DFX amorphous dispersioncompositions and Jadenu (control) was conducted in male beagle dogs.Each group of dogs (n=4) was fasted overnight prior to dosing; food wasreturned after the 4 hour post dose blood collection. Each animal,weight 8 to 12 kg, was dosed with a single unit containing 360 mg DFX.Sodium heparin was used as an anti-coagulant for 1 mL blood samples thatwere collected by direct venipuncture of a cephalic vein and placed at2-8° C. on wet ice. Samples were collected at 0.5, 1, 1.5, 2, 3, 4, 6,12, 24, and 48 hr, post dose. Samples were centrifuged at 3500 rpm toisolate plasma for 10 minutes at 2 to 8° C. The resulting plasma wastransferred to individual polypropylene tubes and immediately placed ondry ice until storage at nominally −20° C. for analysis. The plasmasamples were analyzed for total DFX species (free and iron-bound DFX)concentration using a Research Grade LC-MS/MS Assay. Linear Trapezoidalnon-compartmental pharmacokinetic analysis was performed in WinNonlinVersion 2.1. The quantitative compositions of the formulations testingand the results of the canine pharmacokinetic analysis are provided inTables 11-13.

TABLE 11 Quantitative composition of Formulation 1 (eroding tablet)Component % w/w mg/tablet Lot 13-004-79 99.50 720.00 Magnesium stearate0.50 3.62 Total 100.00 723.62

TABLE 12 Quantitative composition of Formulation 2 (disintegratingtablet) Component % w/w mg/tablet Lot 13-004-79 80.0 720.00Microcrystalline 12.0 108.00 cellulose Croscarmellose 5.0 45.00 Sodiumchloride 2.5 22.50 Magnesium stearate 0.5 4.50 Total 100.0 900.00

TABLE 12 Quantitative composition of Formulation 3 (capsule) mg/Component % w/w capsule Lot 13-004-50 100.0 900.0

TABLE 13 Pharmacokinetic parameters following oral administration of newDFX amorphous dispersion formulations and the commercial product,Jadenu ® (control) Jadenu Formulation 1 Formulation 2 Formulation 3(Group 1) (Group 2) (Group 3) (Group 4) Mean SD Mean SD Mean SD Mean SD(ng/mL) (ng/mL) (ng/mL) (ng/mL) (ng/mL) (ng/mL) (ng/mL) (ng/mL)AUC_((0-x)) hr · ng/mL 117,075.00 29,729.15 54,475.00 10,155.91184,975.00 92,725.06 168,500.00 26,888.66 AUC_((0-∞)) hr · ng/mL117,750.00 29,590.26 54,825.00 10,247.72 186,075.00 93,295.35 169,250.0026,874.71 % AUC Extrap % 0.627 0.425 0.627 0.318 0.592 0.133 0.454 0.315Cmax ng/mL 24,100.00 5,405.55 7,897.50 1,214.86 53,825.00 24,062.3332,925.00 10,679.07 tmax hr 1.75 0.289 1.88 0.250 1.00 0.408 1.13 0.250Terminal t½ hr 8.55 0.992 7.49 1.42 8.93 0.793 7.63 1.16 Rel. BA % 100%NA 47% NA 158% NA 144% NA

These results show that Formulations 2 and 3 improved thebioavailability of DFX relative to Jadenu® by 58% and 44% (based on meanAUC_(0-∞)), respectively. Formulation 3 was also found to providereduced variability of total DFX exposure (AUC_(0-∞)) relative toJadenu®. Formulation 1, which was designed for extended DFX release froman eroding tablet, was found to provide substantially lower oralabsorption relative to Jadenu® (47% of mean AUC_(0-∞)).

The PK results in conjunction with the in vitro dissolution resultsdemonstrate the substantial advantages of the amorphous dispersionformulations of DFX with regard to enhancing dissolution properties andoral bioavailability. Considering that Formulations 1 and 2 contain theidentical amorphous solid dispersion formulation (50% DFX, 50%copovidone) and it is only the tablet design that differs, it is evidentthat the PK performance with this intermediate can be modulated bysimply adjusting the external-phase of the tablet composition andgeometry of the eroding tablet. This feature provides the capability oftuning the final dosage form to achieve a wide range of potentiallydesirable PK profiles.

Example 7—Pharmacokinetic Experiments in Humans

In vivo human studies were performed to evaluate and compare the oralbioavailability and the maximum deferasirox plasma concentrationsachieved after administration of two Test deferasirox formulations withresults obtained with Jadenu™ tablets (deferasirox), when administeredas a single oral dose in healthy subjects under fasting conditions.Also, the effect of food on Test deferasirox 360 mg tablet formulationsno. 30011 and no. 30012, a comparison of T_(max), t_(1/2) and otherpharmacokinetic parameters among the different deferasirox dosage formsin healthy subjects under fasting and fed conditions, and monitoring ofthe safety of single doses of each Test deferasirox formulation andJadenu™, when administered to healthy subjects under fasting and/or fedconditions, was conducted.

The study was a single center, randomized, single dose,laboratory-blinded, 3-period, 3-sequence, crossover format. Twenty-fourpatients were planned for inclusion (12 subjects in each arm) and thestudy was fully enrolled. On patient discontinued, and 24 patients wereanalyzed. Twenty-four patients were considered in the pharmacokineticand statistical analysis (subject 013, Period 3 was excluded from thefood effect of treatment-6 and treatment-5 comparison), and 24 patientswere considered in the safety analysis.

Subjects were male or female, at least 18 years of age but not olderthan 60 years. The main inclusion criteria were:

-   -   light, non- or ex-smokers    -   body mass index (BMI) ≥20.00 kg/m² and <30.00 kg/m²    -   body weight of at least 65 kg but below 90 kg    -   no clinically significant abnormality found in the 12-lead ECG        performed at study entry    -   negative pregnancy test for female subjects    -   healthy according to medical history, complete physical        examination (including vital signs) and laboratory tests        (general biochemistry, hematology and urinalysis)

Test 1 used deferasirox (Formulation no. 30011) produced according tothe methods described in Example 1. A tablet dosage form for oraladministration was administered in a single dose of 14 mg/kg, rounded tothe nearest whole 360 mg tablet. The batch no. was 15L001.

Test 2 used deferasirox (Formulation no. 30012) produced according tothe methods described in Example 1. A tablet dosage form for oraladministration was administered in a single dose of 14 mg/kg, rounded tothe nearest whole 360 mg tablet. The batch no. was 15L002.

Reference product was Jadenu™ (deferasirox). A tablet dosage form fororal administration was administered in a single dose of 14 mg/kg,rounded to the nearest whole 360 mg tablet. The batch no. was F0007.

Treatments for Arm 1 (subjects 001 to 012) were as follows:

-   Treatment-1: The Test-1 formulation orally administered with 240 mL    of water in the morning after a 10-hour overnight fast-   Treatment-2: The Reference formulation orally administered with 240    mL of water in the morning after a 10-hour overnight fast-   Treatment-3: The Test-1 formulation orally administered with 240 mL    of water in the morning after a 10-hour overnight fast, thirty    minutes after the start of a high-fat, high-calorie breakfast.

Treatments for Arm 2 (subjects 013 to 024) were as follows:

-   Treatment-4: The Test-2 formulation orally administered with 240 mL    of water in the morning after a 10-hour overnight fast-   Treatment-5: The Reference formulation orally administered with 240    mL of water in the morning after a 10-hour overnight fast-   Treatment-6: The Test-2 formulation orally administered with 240 mL    of water in the morning after a 10-hour overnight fast, thirty    minutes after the start of a high-fat, high-calorie breakfast.

A single 14 mg/kg of deferasirox, rounded to the nearest whole 360 mgtablet, was administered under fasting (Treatment-1, Treatment-2,Treatment-4, and Treatment-5) and fed (Treatment-3 and Treatment-6)conditions in each study period. The drug administrations were separatedby a wash-out of 7 calendar days.

In each study period, 19 blood samples were collected. The first bloodsample was collected prior to drug administration while the others werecollected up to 48 hours after the drug administration.

Analysis for deferasirox in human plasma was performed using HPLC withMS/MS detection. The assay range was 0.100 μg/mL to 100.000 μg/mL.

Safety was evaluated through assessment of adverse events, standardlaboratory evaluations, vital signs, and physical examination.

The main absorption and disposition parameters were calculated using anon-compartmental approach with a log-linear terminal phase assumption.The trapezoidal rule was used to estimate area under the curve. Theterminal phase estimation was based on maximizing the coefficient ofdetermination. The pharmacokinetic parameters of this trial wereC_(max), T_(max), AUC_(0-T), AUC_(0-∞, AUC) _(0-T/∞), λ_(Z), CL_(TOT)/F,V_(D)/F and T_(half).

The statistical analysis was based on a parametric ANOVA model of thepharmacokinetic parameters; the two-sided 90% confidence interval of theratio of geometric means for the C_(max), AUC_(0-T) and AUC_(0-∞) wasbased on 1n-transformed data; the T_(max) was rank-transformed.

ANOVA model was applied and used the fixed factors of sequence, period,treatment, and a random factor of the subject (nested within sequence).

The food effect was determined by comparing the C_(max), AUC_(0-T),AUC_(0-∞) and T_(max) obtained for the fasted and fed conditions afteradministration of the Test-1 and Test-2 products. Deferasiroxadministered under fasted conditions will be considered the referencetreatment and deferasirox administered with a high-fat meal will beconsidered the test treatment. An absence of food effect on thepharmacokinetic profile of the Test product is indicated when:

-   -   For the Test-1, the ratio of geometric LSmeans with        corresponding 90% confidence interval calculated from the        exponential of the difference between the Treatment-3 and        Treatment-1 for the 1n-transformed parameters C_(max), AUC_(0-T)        and AUC_(0-∞) were all to be within the 80.00 to 125.00%        bioequivalence range.    -   For the Test-2, The ratio of geometric LSmeans with        corresponding 90% confidence interval calculated from the        exponential of the difference between the Treatment-6 and        Treatment-4 for the 1n-transformed parameters C_(max), AUC_(0-T)        and AUC_(0-∞) were all to be within the 80.00 to 125.00%        bioequivalence range.

The results of these studies are shown in the following tables.

TABLE 14 Pharmacokinetic parameters for Treatment 1 (Formulation 30011,fasted) versus Treatment 2 (Jadenu reference, fasted) Treatment-1(Test-1-#30011, Treatment-2 Fast) (Reference Jadenu ™) (n = 12) (n =12)^(b) PARAMETER MEAN C.V. (%) MEAN C.V. (%) C_(max) (μg/mL) 55.636(25.4) 45.071 (38.8) In (C_(max)) 3.9878 (6.6) 3.7284 (11.7) T_(max)(hours)^(a) 3.50 (2.50-5.00) 2.50 (1.50-5.00) AUC_(0-T) (μg · h/mL)553.883 (28.8) 489.876 (42.9) In (AUC_(0-T)) 6.2794 (4.6) 6.1223 (6.3)AUC_(0-∞) (μg · h/mL) 590.016 (31.9) 542.527 (46.4) In (AUC_(0-∞))6.3353 (4.9) 6.2127 (6.7) AUC_(0-T/∞) (%) 94.66 (4.6) 92.86 (5.2) λ_(Z)(hours⁻¹) 0.0668 (38.9) 0.0612 (39.9) T_(half) (hours) 11.63 (34.6)12.80 (33.2) V_(D)/F (L) 31.82 (33.7) 41.63 (49.0) Cl_(TOT)/F (L/h) 2.00(29.8) 2.32 (36.8) ^(a)Median (range) ^(b)n = 11 for λ_(Z,) AUC_(0-∞),AUC_(0-T/∞), T_(half), V_(D)/F and Cl_(TOT)/F

TABLE 15 Pharmacokinetic parameters for Treatment 3 (Formulation 30011,fed) versus Treatment 1 (Formulation 30011, fasted) GEOMETRIC LSMEANS *Treatment-3 Treatment -1 INTRA-SUBJECT (30011, Fed) (30011, Fast) 90%CONFIDENCE LIMITS (%) PARAMETER C.V. (%) (n = 12) (n = 12) RATIO (%)LOWER UPPER C_(max) 28.3 43.56 53.937 80.75 66.43 98.16 AUC_(0-T) 16.0518.77 533.468 97.24 86.95 108.76 AUC_(0-∞) 14.5 553.25 564.131 98.0788.60 108.55 ^(a) units are μg/mL for C_(max) and μg · h/mL forAUC_(0-T) and AUC_(0-∞)

TABLE 16 Pharmacokinetic parameters for Treatment 4 (Formulation 30012,fasted) versus Treatment 5 (Jadenu reference, fasted) Treatment-4Treatment-5 (30012, Fast) (Reference Jadenu ™) (n = 12)^(b) (n = 12)^(b)PARAMETER MEAN C.V. (%) MEAN C.V. (%) C_(max) (μg/mL) 58.019 (27.2)45.538 (26.8) In (C_(max)) 4.0228 (7.4) 3.7862 (7.0) T_(max) (hours)^(a)4.00 (2.50-5.00) 3.00 (2.00-4.00) AUC_(0-T) (μg · h/mL) 539.847 (30.4)472.468 (34.6) In (AUC_(0-T)) 6.2473 (5.0) 6.0971 (6.2) AUC_(0-∞)556.538 (31.8) 499.076 (33.8) (μg · h/mL) In (AUC_(0-∞)) 6.2755 (5.1)6.1547 (6.0) AUC_(0-T/∞) (%) 95.40 (2.7) 95.48 (6.3) λ_(Z) (hours⁻¹)0.0694 (30.0) 0.0748 (27.5) T_(half) (hours) 10.70 (25.1) 10.26 (42.1)V_(D)/F (L) 33.02 (46.6) 37.17 (67.2) Cl_(TOT)/F (L/h) 2.13 (32.2) 2.45(39.1) ^(a)Median (range) ^(b)n = 11 for λ_(Z), AUC_(0-∞), AUC_(0-T/∞,)T_(half), V_(D)/F and Cl_(TOT)/F

TABLE 17 Pharmacokinetic parameters for Treatment 6 (Formulation 30012,fed) versus Treatment 4 (Formulation 30012, fasted) GEOMETRIC LSMEANS *Treatment -6 Treatment -4 INTRA-SUBJECT (30012, Fed) (30012, Fast) 90%CONFIDENCE LIMITS (%) PARAMETER C.V. (%) (n = 11) ^(b) (n = 12) ^(c)RATIO (%) LOWER UPPER C_(max) 18.9 55.86 39.45 70.63 61.59 81.00AUC_(0-T) 14.3 516.62 449.18 86.95 78.35 96.49 AUC_(0-∞) 14.7 532.52468.27 87.93 78.61 98.37 ^(a) units are μg/mL for Cmax and μg · h/mL forAUC_(0-T) and AUC_(0-∞) ^(b) n = 10 AUC_(0-∞) for Treatment-6 ^(c) n =11 AUC_(0-∞) for Treatment-4

The PK parameters provided in Table 14 demonstrate that Formulation30011 (a composition made according to methods described in Example 1)showed superior pharmacokinetic performance in fasted human subjectsrelative to the reference formulation, Jadenu®. Specifically, theC_(max) value was determined to be 30% greater and the total oralabsorption, as indicated by AUC_(0-T) and AUC_(inf), was 17% and 13%greater than Jadenu®, respectively. The superior PK profile offormulation 30011 versus Jadenu® can also be observed qualitatively fromFIG. 16. From this figure, the enhanced C_(max) and AUC can be readilyrecognized by comparing the plasma concentration versus time plots forTreatment 1 (30011) to Treatment 2 (Jadenu®). A reduction inpharmacokinetic variability was also observed for the 30011 formulationrelative to Jadenu® as indicated by the percent C.V. values for C_(max)and AUC_(0-∞). For C_(max), the percent C.V. values were 25.4% and 38.8%for 30011 and Jadenu®, respectively; and for AUC_(0-∞) the percent C.V.values were 31.9% and 46.4% for 30011 and Jadenu® respectively. Uponexamination of FIG. 17, it can be seen that formulation 30011 performedsimilarly or better than Jadenu® for all subjects in the study, with theexception of Subject 3. For subjects 5, 7, 9, and 12; the total oralabsorption with 30011 was found to be substantially better that Jadenu®.This provides some evidence that the compositions of this inventioncould provide a significant improvement in the therapeutic efficacy ofDFX in patients who have been observed to be poor absorbers ofcrystalline DFX. Finally, the results shown in Table 15 demonstrate thatformulation 30011 has a negligible food effect when comparing the fastedresults to those when the formulation is administered following a highfat meal. Specifically, the ratio of AUCs between the fed and fastedstate are greater than 97%. In summary, formulation 30011 wasdemonstrated by these experiments in healthy human subjects to havesuperior PK performance relative to Jadenu in the fasted state and tohave essentially no food effect on drug absorption.

The PK parameters provided in Table 16 demonstrate that Formulation30012 (a composition made according to methods described in Example 1)showed superior pharmacokinetic performance in fasted human subjectsrelative to the reference formulation, Jadenu®. Specifically, theC_(max) value was determined to be 27% greater and the total oralabsorption, as indicated by AUC_(0-T) and AUC_(inf), was 16% and 13%greater than Jadenu®, respectively. The superior PK profile offormulation 30012 versus Jadenu® can also be observed qualitatively fromFIG. 16 From this Figure, the enhanced C_(max) and AUC can be readilyrecognized by comparing the plasma concentration versus time plots forTreatment 4 (30012) to Treatment 5 (Jadenu®). Finally, the results shownin Table 17 demonstrate that formulation 30012 has a limited food effectwhen comparing the fasted results to those when the formulation isadministered following a high fat meal. Specifically, the ratio of AUCsbetween the fed and fasted state are greater than 87%. In summary,formulation 30012 was demonstrated by these experiments in healthy humansubjects to have superior PK performance relative to Jadenu® in thefasted state and to have limited food effect on drug absorption.

All of the compositions and methods disclosed and claimed herein can bemade and executed without undue experimentation in light of the presentdisclosure. While the compositions and methods of this disclosure havebeen described in terms of preferred embodiments, it will be apparent tothose of skill in the art that variations may be applied to thecompositions and methods, and in the steps or in the sequence of stepsof the methods described herein without departing from the concept,spirit and scope of the disclosure. More specifically, it will beapparent that certain agents which are both chemically andphysiologically related may be substituted for the agents describedherein while the same or similar results would be achieved. All suchsimilar substitutes and modifications apparent to those skilled in theart are deemed to be within the spirit, scope and concept of thedisclosure as defined by the appended claims.

V. REFERENCES

The following references, to the extent that they provide exemplaryprocedural or other details supplementary to those set forth herein, arespecifically incorporated herein by reference.

-   1. NICK H et al. ICL670A: Preclinical Profile. In: Hershko, C. ed.    Iron Chelation Therapy. Springer US, 2002: 185-203.-   2. FAN C et al. Impact of polymers on dissolution performance of an    amorphous gelleable drug from surface-coated beads. European Journal    of Pharmaceutical Sciences 2009; 1: 1-10.-   3. CHIRNOMAS D et al. Deferasirox pharmacokinetics in patients with    adequate versus inadequate response, 114,2009.-   4. WALDMEIER F et al. Pharmacokinetics, Metabolism, and Disposition    of Deferasirox in β-Thalassemic Patients with Transfusion-Dependent    Iron Overload Who Are at Pharmacokinetic Steady State. Drug    Metabolism and Disposition 2010; 5: 808-816.-   5. DINUNZIO J C et al. Production of advanced solid dispersions for    enhanced bioavailability of itraconazole using KinetiSol®    Dispersing. Drug Development and Industrial Pharmacy 2010; 9:    1064-1078.-   6. MILLER D et al. Targeted Intestinal Delivery of Supersaturated    Itraconazole for Improved Oral Absorption. Pharm Res 2008; 6:    1450-1459.-   7. MILLER D A et al. Enhanced In Vivo Absorption of Itraconazole via    Stabilization of Supersaturation Following Acidic-to-Neutral pH    Transition. Drug Dev Ind Pharm 2008; 8: 890-902.-   8. HUGHEY J R et al. Thermal processing of a poorly water-soluble    drug substance exhibiting a high melting point: The utility of    KinetiSol® Dispersing. International Journal of Pharmaceutics 2011;    1-2: 222-230.-   9. HUGHEY J et al. Dissolution Enhancement of a Drug Exhibiting    Thermal and Acidic Decomposition Characteristics by Fusion    Processing: A Comparative Study of Hot Melt Extrusion and KinetiSol®    Dispersing. AAPS PharmSciTech 2010; 2: 760-774.-   10. BENNETT R C et al. Preparation of amorphous solid dispersions by    rotary evaporation and KinetiSol Dispersing: approaches to enhance    solubility of a poorly water-soluble gum extract. Drug Development    and Industrial Pharmacy 2013; 0: 1-16.

1. A method of making a pharmaceutical composition comprising: (a)providing crystalline deferasirox (DFX) and one or more pharmaceuticallyacceptable excipients; (b) compounding the materials of step (a) in athermokinetic mixer at less than or equal to 200° C. for less than about300 seconds, wherein the thermokinetic compounding of DFX and the one ormore pharmaceutically acceptable excipients forms a melt blendedpharmaceutical composite.
 2. The method of claim 1, wherein saidpharmaceutical comprises a second active pharmaceutical ingredient inaddition to DFX.
 3. The method of claim 1, wherein the one or morepharmaceutically acceptable excipients comprises a pharmaceuticalpolymer.
 4. The method of claim 1, wherein the one or morepharmaceutically acceptable excipients comprises a surfactant.
 5. Themethod of claim 1, wherein the one or more pharmaceutically acceptableexcipients comprises one or more surfactants and one or more polymercarriers.
 6. The method of claim 1, wherein said composite is anamorphous dispersion.
 7. The method of claim 3, wherein thepharmaceutical polymer comprises an agent selected from the groupconsisting of poly(vinyl acetate)-co-poly(vinylpyrrolidone) copolymer,ethylcellulose, hydroxypropylcellulose, cellulose acetate butyrate,poly(vinylpyrrolidone), poly(ethylene glycol), poly(ethylene oxide),poly(vinyl alcohol), hydroxypropyl methylcellulose,hydroxyethylcellulose, sodium carboxymethyl-cellulose,dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer, cellulose acetate phthalate,cellulose acetate trimelletate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer,hydroxypropylmethylcellulose acetate succinate and polyvinylcaprolactam-polyvinyl acetate-polyethylene glycol graft copolymer. 8.The method of claim 4, wherein the one or more surfactants comprises anagent selected from the group consisting of sodium dodecyl sulfate,dioctyl sodium sulphosuccinate, polyoxyethylene (20) sorbitanmonooleate, glycerol polyethylene glycol oxystearate-fatty acid glycerolpolyglycol esters-polyethylene glycols-glycerol ethoxylate,glycerol-polyethylene glycol ricinoleate-fatty acid esters ofpolyethyleneglycol-polyethylene glycols-ethoxylated glycerol, vitamin ETPGS and sorbitan laurate.
 9. The method of claim 5, wherein thesurfactant comprises an agent selected from the group consisting ofsodium dodecyl sulfate, dioctyl sodium sulphosuccinate, polyoxyethylene(20) sorbitan monooleate, glycerol polyethylene glycol oxystearate-fattyacid glycerol polyglycol esters-polyethylene glycols-glycerolethoxylate, glycerol-polyethylene glycol ricinoleate-fatty acid estersof polyethyleneglycol-polyethylene glycols-ethoxylated glycerol, vitaminE TPGS, and sorbitan laurate, and the pharmaceutical polymer comprisesan agent selected from a group consisting of poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, ethylcellulose,hydroxypropylcellulose, cellulose acetate butyrate,poly(vinylpyrrolidone), poly(ethylene glycol), poly(ethylene oxide),poly(vinyl alcohol), hydroxypropyl methylcellulose,hydroxyethylcellulose, sodium carboxymethyl-cellulose,dimethylaminoethyl methacrylate-methacrylic acid ester copolymer,ethylacrylate-methylmethacrylate copolymer, cellulose acetate phthalate,cellulose acetate trimelletate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer,hydroxypropylmethylcellulose acetate succinate and polyvinylcaprolactam-polyvinyl acetate-polyethylene glycol graft copolymer. 10.The method of claim 1, wherein said composition remains amorphous perx-ray diffraction analysis following storage in an open container atabout 40° C., relative humidity of about 75%, at five weeks.
 11. Themethod of claim 1, wherein the composition comprises about 30%-60% DFX,about 40%-60% DFX, about 30% DFX, 35% DFX, 40% DFX, 45% DFX, 50% DFX,55% DFX, or 60% DFX.
 12. The method of claim 1, wherein the one or morepharmaceutically acceptable excipients comprises a processing agent,such as a plasticizer.
 13. The method of claim 1, wherein step (b) isperformed at a temperature of about 100° C., about 125° C., about 150°C., about 180° C., or about 100° C. to 200° C.
 14. The method of claim1, wherein the one or more pharmaceutically acceptable excipientscomprises a water soluble pharmaceutical polymer.
 15. The method ofclaim 14, wherein the water soluble pharmaceutical polymer comprises apolymer selected from a group consisting of poly(vinylacetate)-co-poly(vinylpyrrolidone) copolymer, poly(vinylpyrrolidone),cellulose acetate phthalate, poly(vinyl acetate) phthalate,hydroxypropylmethylcellulose phthalate, poly(methacrylate ethylacrylate)(1:1) copolymer, poly(methacrylate methylmethacrylate) (1:1) copolymer,poly(methacrylate methylmethacrylate) (1:2) copolymer, hydroxypropylmethylcellulose, hydroxypropylmethylcellulose acetate succinate,poly(vinyl alcohol), and polyvinyl caprolactam-polyvinylacetate-polyethylene glycol graft copolymer.
 16. The method of claim 1,wherein the one or more pharmaceutically acceptable excipients comprisesa cross-linked pharmaceutical polymer.
 17. The method of claim 16,wherein the cross-linked pharmaceutical polymer is, carbomer,crospovidone, or croscarmellose sodium.
 18. The method of claim 1,wherein the one or more pharmaceutically acceptable excipients comprisesa pharmaceutical polymer of high melt viscosity.
 19. The method of claim1, wherein the one or more pharmaceutically acceptable excipientscomprises a thermally labile pharmaceutical polymer.
 20. The method ofclaim 1, wherein the one or more pharmaceutically acceptable excipientscomprises poly(methacrylate ethylacrylate) (1:1) copolymer or poly(vinylacetate)-co-poly(vinylpyrrolidone).
 21. The method of claim 1, whereinthe one or more pharmaceutically acceptable excipients comprisespoly(methacrylate ethylacrylate) (1:1) copolymer and poly(vinylacetate)-co-poly(vinylpyrrolidone).
 22. The method of claim 1, whereinthe one or more pharmaceutically acceptable excipients comprisespoly(vinyl acetate)-co-poly(vinylpyrrolidone) andhydroxypropylmethylcellulose acetate succinate.
 23. The method of claim1, wherein said composition has a single glass transition temperature.24. The method of claim 1, wherein the purity of DFX in said compositionis about 95%, is about 99%, is about 99.5%, or is about 95% to about100%.
 25. The method of claim 1, wherein the DFX to pharmaceuticalpolymer ratio is about 2:8 to about 7:3, including about 1:1. 26-138.(canceled)